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October 22nd, 2011, 06:00 AM
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Editor, Senior Moderator
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Russia ILI surveillance 2011-2012
2010-2011 thread is here; http://www.flutrackers.com/forum/sho...d.php?t=159064
Week 42 10.10.2011-16.10.2011
Influenza and ARI morbidity data
Clinical and virological data show low influenza activity in Russia. Epidemic threshold of morbidity for overall population (specific for each city) was exceeded in two cities (Volgograd, Voronezh) from 59 ones under surveillance. The nationwide ILI & ARI morbidity level registered this week was below the national baseline (66.5 per 10 000) by 13.2%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 51 RBLs. According to these data as a result of investigation of 1351 patients the overall proportion of respiratory samples positive for influenza was estimated as 0.3% including 0.1% for influenza A virus, 0.1% for influenza A(H3N2) virus and 0.1% for influenza B virus. No pandemic influenza A(H1N1)pdm2009 virus was detected (table 4).
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 706 patients with ILI and ARI were investigated by IFA in 40 RBLs for detection of antigens of influenza viruses, parainfluenza, RSV and adenoviruses. A total of 3 (0.4%) influenza cases were diagnosed, including:
- 2 (0.3%) influenza A(H3N2) cases in two cities: Smolensk (Central Federal District) and St-Petersburg (North-Western FD),
- 1 (0.1%) influenza B cases in St-Petersburg.
Mid-value for IFA detection of influenza and other respiratory viruses was estimated as 28.6%. Non-influenza respiratory viruses caused 28.2% of all investigated ARVI cases including 12.4%, 9.1% and 6.7% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
Influenza Virus RNA Detection by RT-PCR
During this week clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 45 RBLs. Influenza A virus was detected in 0.1% of 816 investigated samples. No pandemic influenza A(H1N1)pdm09, seasonal influenza A(H1N1), influenza A(H3N2), A(H5N1) or influenza B cases were detected. Rate of PCR diagnosis of other respiratory infections was estimated as 22.8% including parainfluenza in 9.8% of 480 patients, adenovirus infection in 4.5% of 292 patients, RSV infection in 8.5% of 434 investigated samples (table 3).
Conclusion
Influenza and ARI morbidity data. Clinical and virological data show low influenza activity in Russia. Epidemic threshold of morbidity for overall population (specific for each city) was exceeded in two cities (Volgograd, Voronezh) from 59 ones under surveillance. The nationwide ILI & ARI morbidity level registered this week was below the national baseline (66.5 per 10 000) by 13.2%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by IFA and rRT-PCR was estimated as 0.3%, for parainfluenza, adenovirus and RSV in total - as 22.8% (PCR testing) and 28.2% (IFA) .
Sentinel surveillance. Clinical samples from 28 SARI patients and 42 ILI/ARI patients were investigated, no influenza case was detected.
http://www.influenza.spb.ru/en/influ...mic_situation/
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Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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November 5th, 2011, 06:30 AM
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Editor, Senior Moderator
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Re: Russia ILI surveillance 2011-2012
Week 43 17.10.2011-23.10.2011
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 51 RBLs. According to these data as a result of investigation of 1323 patients the overall proportion of respiratory samples positive for influenza was estimated as 0.6% including 0.4% for influenza A(H3N2) virus and 0.2% for influenza B virus. No influenza A(H1N1)pdm2009 virus was detected (table 4).
Influenza Virus Isolation
During the reported week (October 17 - 23.2011) investigations on influenza virus isolation were conducted in 3 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 35 clinical samples testing no influenza virus was isolated (table 1).
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 732 patients with ILI and ARI were investigated by IFA in 41 RBLs for detection of antigens of influenza viruses, parainfluenza, RSV and adenoviruses. A total of 7 (0.9%) influenza cases were diagnosed, including:
- 4 (0.5%) influenza A(H3N2) cases in 3 cities: Kirov (the Volga Federal District), Krasnoyarsk (Siberian FD) and St-Petersburg (North-Western FD),
- 3 (0.4%) influenza B cases in Krasnoyarsk.
Mid-value for IFA detection of influenza and other respiratory viruses was estimated as 25.4%. Non-influenza respiratory viruses caused 24.3% of all investigated ARVI cases including 11.8%, 6.8% and 5.7% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
Influenza Virus RNA Detection by RT-PCR
During this week clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 44 RBLs. Influenza A(H3N2) virus was detected in one case (0.4%) of 226 investigated samples. No influenza A(H1N1)pdm09, seasonal influenza A(H1N1), influenza A(H5N1) or influenza B cases were detected. Rate of PCR diagnosis of other respiratory infections was estimated as 16.2% including parainfluenza in 5.1% of 495 patients, adenovirus infection in 3.4% of 358 patients, RSV infection in 7.7% of 479 investigated samples (table 3).
Conclusion
Influenza and ARI morbidity data. Clinical and virological data show low influenza activity in Russia. Epidemic thresholds of morbidity for overall population (specific for each city) were not exceeded in none of 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week (58.2 per 10 000) was below the national baseline (66.5 per 10 000) by 12.5%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by IFA and rRT-PCR was estimated as 0.6%, for parainfluenza, adenovirus and RSV in total - as 16.2% (PCR testing) and 24.3% (IFA) .
Sentinel surveillance. Clinical samples from 30 SARI patients and 41 ILI/ARI patients were investigated, no influenza case was detected.
http://www.influenza.spb.ru/en/influ...mic_situation/
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Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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November 12th, 2011, 06:01 AM
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Editor, Senior Moderator
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Re: Russia ILI surveillance 2011-2012
Week 24.10.2011-30.10.2011
Influenza and ARI morbidity data
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 54 RBLs. According to these data as a result of investigation of 1524 patients the overall proportion of respiratory samples positive for influenza was estimated as 1.1% including 0.4% for influenza A(H3N2) virus and 0.6% for influenza B virus and 0.1% for influenza A(H1N1)pdm2009 virus (table 4).
Influenza Virus Isolation
During the reported week (October 24 - 30.2011) investigations on influenza virus isolation were conducted in 3 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 38 clinical samples testing no influenza virus was isolated (table 1).
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 867 patients with ILI and ARI were investigated by IFA in 44 RBLs for detection of antigens of influenza viruses, parainfluenza, RSV and adenoviruses. A total of 10(1.2%) influenza cases were diagnosed, including:
- 5 (0.6%) influenza A(H3N2) cases in 3 cities (Kazan, Krasnoyarsk, Smolensk),
- 5 (0.6%) influenza B cases in Krasnoyarsk and Omsk.
Mid-value for IFA detection of influenza and other respiratory viruses was estimated as 25.7%. Non-influenza respiratory viruses caused 24.6% of all investigated ARVI cases including 11.5%, 6.9% and 6.2% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
Influenza Virus RNA Detection by RT-PCR
During this week clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 47 RBLs. Influenza A(H3N2) virus was detected in Khabarovsk in one case (0.4%) of 226 investigated samples. Influenza A(H1N1)pdm09 cases were detected in 2 cases (Krasnodar, Saratov) and influenza B - in 4 cases (Izhevsk). Rate of PCR diagnosis of other respiratory infections was estimated as 23.1% including parainfluenza in 7.6% of 565 patients, adenovirus infection in 3.2% of 438 patients, RSV infection in 12.3% of 529 investigated samples (table 3).
Conclusion
Influenza and ARI morbidity data. Clinical, epidemiological and virological data show low influenza activity in Russia. Epidemic thresholds of morbidity for overall population (specific for each city) were exceeded slightly in two of 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week was below the national baseline (66.5 per 10 000) by 12.9%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by IFA and rRT-PCR was estimated as 1.1%, for parainfluenza, adenovirus and RSV in total - as 23.1% (PCR testing) and 24.6% (IFA) .
Sentinel surveillance. Clinical samples from 42 SARI patients and 33 ILI/ARI patients were investigated, no influenza case was detected
http://www.influenza.spb.ru/en/influ...mic_situation/
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Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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November 18th, 2011, 03:51 PM
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Editor, Senior Moderator
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Re: Russia ILI surveillance 2011-2012
Week 07.11.2011-13.11.2011
Influenza and ARI morbidity data
Clinical, epidemiological and virological data show low influenza activity in Russia. Epidemic thresholds of morbidity for overall population (specific for each city) were exceeded by 51.1% in one and by 21.3% - 45.1% in four of 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week was below the national baseline (66.5 per 10 000) by 16.5%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 52 RBLs. According to these data as a result of investigation of 1533 patients the overall proportion of respiratory samples positive for influenza was estimated as 1.2% including 0.7% for influenza A(H1N1)pdm09, 0.2% for influenza A(H3N2) virus and 0.3% for influenza B virus (table 4).
Influenza Virus Isolation
During the reported week (October 31 - November 06.2011) investigations on influenza virus isolation were conducted in 8 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 97 clinical samples testing no influenza virus was isolated (table 1).
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 906 patients with ILI and ARI were investigated by IFA in 42 RBLs for detection of antigens of influenza viruses, parainfluenza, RSV and adenoviruses. A total of 5 (0.6%) influenza cases were diagnosed, including:
- 2 (0.2%) influenza A(H3N2) cases in 2 cities (Kirov, Krasnoyarsk),
- 3 (0.3%) influenza B cases in 2 cities (Kirov, Omsk).
Mid-value for IFA detection of influenza and other respiratory viruses was estimated as 23.5%. Non-influenza respiratory viruses caused 22.9% of all investigated ARVI cases including 10.4%, 6.8% and 5.7% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
Influenza Virus RNA Detection by RT-PCR
During this week clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 49 RBLs.
For RT-PCR diagnostic of influenza A clinical samples from 966 patients were investigated, for seasonal influenza A(H1N1) - from 153 patients, for influenza A(H5N1) - from 43 patients, for influenza A(H3N2) - from 305 patients, for influenza A(H1N1)pdm09 - from 627patients and for influenza B - from 1045 patients.
Influenza A(H3N2) virus was detected in two cases (0.7%) in Yakutsk,
influenza B - in two cases (0.1%) in Volgograd,
influenza A(H1N1)pdm09 - in 10 cases (1.6%) in Voronezh.
Rate of PCR diagnosis of other respiratory infections was estimated as 20.7% including parainfluenza in 4.5% of 538 patients, adenovirus infection in 3.5% of 426 patients, RSV infection in 12.7% of 473 investigated samples (table 3).
Conclusion
Influenza and ARI morbidity data. Clinical, epidemiological and virological data show low influenza activity in Russia. Epidemic thresholds of morbidity for overall population (specific for each city) were exceeded in five of 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week was below the national baseline (66.5 per 10 000) by 16.5%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by IFA and rRT-PCR was estimated as 1.2%, for parainfluenza, adenovirus and RSV in total - as 20.7% (PCR) and 22.9% (IFA) .
Sentinel surveillance. Clinical samples from 36 SARI patients and 40 ILI/ARI patients were investigated, no influenza case was detected.
http://www.influenza.spb.ru/en/influ...mic_situation/
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Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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November 25th, 2011, 07:13 PM
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Re: Russia ILI surveillance 2011-2012
Week 14.11.2011-20.11.2011
Influenza and ARI morbidity data
Clinical, epidemiological and virological data show low influenza activity in Russia. Epidemic thresholds of morbidity for overall population (specific for each city) were exceeded in three of 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week was below the national baseline (66.5 per 10 000) by 12.6%.
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Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by IFA and rRT-PCR was estimated as 0.4%, for parainfluenza, adenovirus and RSV in total - as 20.5% (PCR) and 25.8% (IFA) .
Sentinel surveillance. Clinical samples from 38 SARI patients and 42 ILI/ARI patients were investigated, no influenza cases were detected.
http://www.influenza.spb.ru/en/influ...mic_situation/
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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December 4th, 2011, 05:56 AM
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Re: Russia ILI surveillance 2011-2012
Week 21.11.2011-27.11.2011
Influenza and ARI morbidity data
Clinical, epidemiological and virological data show low influenza activity in Russia. Epidemic thresholds of morbidity for overall population (specific for each city) were exceeded slightly in two of 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week was below the national baseline (66.5 per 10 000) by 7.4%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 50 RBLs. According to these data as a result of investigation of 1662 patients the overall proportion of respiratory samples positive for influenza was estimated as 1.0% including 0.8% for influenza A(H3N2) virus and 0.1% for influenza B virus (table 4).
....
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by IFA and rRT-PCR was estimated as 1.0%, for parainfluenza, adenovirus and RSV in total - as 21.4% (PCR) and 23.5% (IFA) .
Sentinel surveillance. Clinical samples from 41 SARI patients and 65 ILI/ARI patients were investigated, no influenza cases were detected.
http://www.influenza.spb.ru/en/influ...mic_situation/
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Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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December 10th, 2011, 05:59 AM
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Re: Russia ILI surveillance 2011-2012
Week 28.11.2011-04.12.2011
Influenza and ARI morbidity data
Clinical and epidemiological data show low influenza activity in Russia. Epidemic thresholds of morbidity for overall population (specific for each city) were not exceeded in none of 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week increased slightly but continued to be below the national baseline (66.5 per 10 000) by 4.1%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 54 RBLs. According to these data as a result of investigation of 1867 patients the overall proportion of respiratory samples positive for influenza was estimated as 0.5% including 0.2% for influenza A(H3N2) virus, 0.05% for influenza A(H1N1)pdm09 and 0.3% for influenza B virus (table 4).
...
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by IFA and rRT-PCR was estimated as 0.5%, for parainfluenza, adenovirus and RSV in total - as 22.5% (PCR) and 25.2% (IFA) .
Sentinel surveillance. Clinical samples from 46 SARI patients and 40 ILI/ARI patients were investigated, no influenza cases were detected.
http://www.influenza.spb.ru/en/influ...mic_situation/
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Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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December 17th, 2011, 05:06 AM
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Re: Russia ILI surveillance 2011-2012
Week 05.12.2011-11.12.2011
Influenza and ARI morbidity data
Clinical and epidemiological data show low influenza activity in Russia. Epidemic thresholds of morbidity for overall population (specific for each city) were not exceeded in none of 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week decreased slightly was below the national baseline (66.5 per 10 000) by 7.3%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 52 RBLs. According to these data as a result of investigation of 1714 patients the overall proportion of respiratory samples positive for influenza was estimated as 0.8% including 0.3% for influenza A(H3N2) virus, 0.1% for influenza A(H1N1)pdm09, 0.1% for influenza A virus and 0.2% for influenza B virus (table 4).
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Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by IFA and rRT-PCR was estimated as 0.8%, for parainfluenza, adenovirus and RSV in total - as 24.8% (PCR) and 25.9% (IFA) .
Sentinel surveillance. Clinical samples from 65 SARI patients and 53 ILI/ARI patients were investigated, no influenza cases were detected.
http://www.influenza.spb.ru/en/influ...mic_situation/
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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December 23rd, 2011, 05:52 AM
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Re: Russia ILI surveillance 2011-2012
Week 12.12.2011-18.12.2011
Influenza and ARI morbidity data
Clinical and epidemiological data show low influenza activity in Russia. Epidemic threshold of morbidity for overall population (specific for each city) was exceeded in one city of Ural FD (Ekaterinburg) from 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week increased slightly but was below the national baseline (66.5 per 10 000) by 6.3%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 52 RBLs. According to these data as a result of investigation of 1759 patients the overall proportion of respiratory samples positive for influenza was estimated as 0.6% including 0.2% for influenza A(H3N2) virus and 0.3% for influenza B virus (table 4).
...
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 0.6%, for parainfluenza, adenovirus and RSV in total - as 13.9% (PCR) and 26.7% (IFA) .
Sentinel surveillance. Clinical samples from 53 SARI patients and 47 ILI/ARI patients were investigated, no influenza cases were detected.
http://www.influenza.spb.ru/en/influ...mic_situation/
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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January 16th, 2012, 06:28 AM
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Re: Russia ILI surveillance 2011-2012
After a long hiatus, an RII update. They skipped week 52 of 2011 and released Weeks 1 and 2 of 2012 today; http://www.influenza.spb.ru/en/influ...mic_situation/
Week 02.01.2012-08.01.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show low influenza activity in all cities of Russia. The nationwide ILI & ARI morbidity level registered was below the national baseline by 65.0%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 11 RBLs. According to these data as a result of investigation of 171 patients, the overall proportion of respiratory samples positive for influenza A(H3N2) virus was estimated as 2.3% (table 4).
Influenza Virus Isolation
During the reported week (January 2 - 8. 2012) investigations on influenza virus isolation were conducted in 2 Regional Base Laboratories (RBLs) participating in influenza surveillance only. As a result of 34 clinical samples testing one influenza A(H3N2) virus was isolated in Astrakhan city located in Southern Federal District (table 1).
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 54 patients with ILI and ARI in 5 RBLs were investigated by IFA for direct detection of antigens in clinical samples. No influenza cases were detected. Non-influenza respiratory viruses caused 11.1% of all investigated cases (incomplete data for holidays during week 2) (table 2).
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 9 RBLs only.
Influenza A(H3N2) virus was detected in 3 cases in Volga FD. Rate of PCR diagnosis of other respiratory infections was estimated as 9.7% (table 3).
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Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza A(H3N2) by virus isolation, IFA and rRT-PCR was estimated as 2.3%.
Sentinel surveillance. Clinical samples from 20 SARI and ILI/ARI patients were investigated, no influenza cases were detected.
__________________
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The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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January 20th, 2012, 06:11 AM
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Re: Russia ILI surveillance 2011-2012
Week 09.01.2012-15.01.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show low influenza activity in Russia. Epidemic thresholds of morbidity for overall population (specific for each city) were not exceeded at any of 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week was below the national baseline (66.5 per 10 000) by 43.7%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 52 RBLs. According to these data as a result of investigation of 1190 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 1.1% including 0.1% for influenza A(H1N1)pdm09 virus, 0.4% for
A(H3N2) virus, 0.3% for non subtyped influenza A virus and 0.3% for influenza B virus (table 4).
Influenza Virus Isolation
During the reported week (January 09 - 15. 2012) investigations on influenza virus isolation were conducted in 8 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 110 clinical samples testing no influenza virus was isolated (table 1).
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 715 patients with ILI and ARI in 42 RBLs were investigated by IFA for direct detection of antigens in clinical samples. A total of 5 (0.7%) influenza cases were detected including:
- 3 (0.4%) influenza A(H3N2) cases in 3 cities of 3 Federal Districts (Siberian, North-Western and Central),
- 2 (0.3%) influenza B cases in 2 cities of two Federal Districts (Siberian and North-Western).
Non-influenza respiratory viruses caused 23.6% of all investigated ILI and ARI cases including 11.0%, 5.6% and 7.0% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 44 RBLs.
Influenza A(H1N1)pdm09 virus was detected in 1 (0.2%) case in Central FD,
influenza A(H3N2) virus was detected in 2 (0.6%) cases in Siberian and Volga FD,
non subtyped influenza A virus was detected in 3 (0.4%) cases in one city of Volga FD,
influenza B virus - in 2 (0.3%) cases in Central and Southern FD,
Rate of PCR diagnosis of other respiratory infections was estimated as 25.8% including parainfluenza in 8.0%, adenovirus infection in 3.9%, RSV infection in 13.9% (table 3).
...
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 1.1%, for parainfluenza, adenovirus and RSV in total - as 25.8% (PCR) and 23.6% (IFA) .
Sentinel surveillance. Clinical samples from 28 SARI patients and 35 ILI/ARI patients were investigated, no influenza cases were detected.
http://www.influenza.spb.ru/en/influ...mic_situation/
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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January 26th, 2012, 05:34 PM
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Re: Russia ILI surveillance 2011-2012
Week 16.01.2012-22.01.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show low influenza activity in Russia. Epidemic thresholds of morbidity for overall population (specific for each city) were not exceeded at any of 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week was below the national baseline (66.5 per 10 000) by 22.6%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 53 RBLs. According to these data as a result of investigation of 1461 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 1.2% including 0.5% for A(H3N2) virus, 0.3% for non subtyped influenza A virus and 0.4% for influenza B virus. No influenza A(H1N1)pdm09 virus was detected (table 4).
Influenza Virus Isolation
During the reported week (January 16 - 22. 2012) investigations on influenza virus isolation were conducted in 11 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 196 clinical samples testing one influenza virus type B was isolated in Novosibirsk (Siberian Federal District) (table 1).
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 875 patients with ILI and ARI in 44 RBLs were investigated by IFA for direct detection of antigens in clinical samples. A total of 12 (1.4%) influenza cases were detected including:
- 7 (0.8%) influenza A(H3N2) cases in 5 cities of 4 Federal Districts (Siberian, North-Western, the Volga and Central),
- 5 (0.6%) influenza B cases in 2 cities of the Volga Federal District.
Non-influenza respiratory viruses caused 28.1% of all investigated ILI and ARI cases including 14.6%, 5.8% and 7.7% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 49 RBLs.
Influenza A(H3N2) virus was detected in 1 (0.3%) case in Southern FD,
non subtyped Influenza A virus was detected in 4 (0.4%) cases in Southern, Central, and the Volga FDs,
influenza B virus - in 1 (0.1%) case in the Volga FD.
Rate of PCR diagnosis of other respiratory infections was estimated as 25.7% including parainfluenza in 9.9%, adenovirus infection in 4.6%, RSV infection in 11.2% (table 3).
...
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 1.2%, for parainfluenza, adenovirus and RSV in total - as 25.7% (PCR) and 28.1% (IFA) .
Sentinel surveillance. Clinical samples from 29 SARI patients and 66 ILI/ARI patients were investigated, no influenza cases were detected.
http://www.influenza.spb.ru/en/influ...mic_situation/
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Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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February 3rd, 2012, 05:06 PM
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Editor, Senior Moderator
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Join Date: Aug 2009
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Re: Russia ILI surveillance 2011-2012
Week 23.01.2012-29.01.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show low influenza activity in Russia. Epidemic thresholds of morbidity for overall population (specific for each city) were not exceeded at any of 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week was below the national baseline (66.5 per 10 000) by 10.8%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 54 RBLs. According to these data as a result of investigation of 1799 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 2.6% including 0.2% for influenza A(H1N1)pdm09 virus, 1.8% for A(H3N2) virus, 0.06% for non subtyped influenza A virus and 0.5% for influenza B virus (table 4).
...
Influenza Virus Isolation
During the reported week (January 23 - 29. 2012) investigations on influenza virus isolation were conducted in 14 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 228 clinical samples testing two influenza A(H3N2) viruses were isolated in Mockow and Vladivostok (Central and Far-Eastern Federal Districts) (table 1).
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Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 1000 patients with ILI and ARI were investigated in 45 RBLs by IFA for direct detection of antigens in clinical samples. A total of 18 (1.8%) influenza cases were detected including:
- 13 (1.3%) influenza A(H3N2) cases in 7 cities of 4 Federal Districts (Siberian, North-Western, Volga and Central),
- 5 (0.5%) influenza B cases in 3 cities of Siberian and Central Federal Districts.
Non-influenza respiratory viruses caused 20.6% of all investigated ILI and ARI cases including 9.4%, 5.7% and 5.5% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
...
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 50 RBLs.
Influenza A(H1N1)pdm09 virus was detected in 4 (0.5%) cases in 2 cities of Siberian and Central Federal Districts,
influenza A(H3N2) virus was detected in 21 (4.3%) cases in 10 cities of 5 Federal Districts (Southern, North-Western, Far-Eastern, Volga and Central),
non subtyped Influenza A virus was detected in 1 (0.1%) case in North-Western FD,
influenza B virus was detected in 4 (0.4%) cases in 4 cities of 4 Federal Districts (Ural, Siberian, Far-Eastern and Central).
Rate of PCR diagnosis of other respiratory infections was estimated as 19.3% including parainfluenza in 6.1%, adenovirus infection in 3.6%, RSV infection in 9.6% (table 3).
...
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 2.6%, for parainfluenza, adenovirus and RSV in total - as 19.3% (PCR) and 20.6% (IFA).
Sentinel surveillance. Clinical samples from 30 SARI patients and 45 ILI/ARI patients were investigated, one influenza A(H3N2) associated SARI case was detected in Far-Eastern Federal District.
http://www.influenza.spb.ru/en/influ...mic_situation/
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Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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February 11th, 2012, 01:12 PM
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Editor, Senior Moderator
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Join Date: Aug 2009
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Re: Russia ILI surveillance 2011-2012
Week 30.01.2012-05.02.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show low influenza activity in Russia although moderate growth of morbidity was registered in some cities. Epidemic threshold of morbidity was exceeded in one city of Far-Eastern FD from 59 cities under surveillance. The nationwide ILI & ARI morbidity level registered this week was slightly above the national baseline (by 1.9%).
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 52 RBLs. According to these data as a result of investigation of 1800 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 3.1% including 0.06% for influenza A(H1N1)pdm09 virus, 1.9% for A(H3N2) virus, 0.6% for non subtyped influenza A virus and 0.6% for influenza B virus (table 4).
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Influenza Virus Isolation
During the reported week (January 30 - February 05. 2012) investigations on influenza virus isolation were conducted in 14 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 262 clinical samples testing one influenza A(H3N2) virus was isolated in Vladivostok city located in Far-Eastern Federal District (FD) and 4 influenza B viruses were isolated in Novosibirsk and Vladivostok (Siberian and Far-Eastern FDs) (table 1).
...
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 992 patients with ILI and ARI were investigated in 40 RBLs by IFA by direct detection of antigens in clinical samples. A total of 20 (2.0%) influenza cases were detected including:
- 15 (1.5%) influenza A(H3N2) cases in 11 cities of 6 FDs (Far-Eastern, Siberian, North-Western, Volga, Southern and Central),
- 5 (0.5%) influenza B cases in 2 cities of Far-Eastern and Volga FDs.
Non-influenza respiratory viruses caused 30.2% of all investigated ILI and ARI cases including 14.1%, 6.5% and 9.6% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 48 RBLs. A total of 36 (5.3%) influenza cases were detected including:
- 1 (0.1%) influenza A(H1N1)pdm09 case in one city of Siberian FD,
- 21 (4.1%) influenza A(H3N2) cases in 10 cities of 5 FDs (Siberian, North-Western, Volga, Southern and Central),
- 10 (0.8%) non subtyped Influenza A cases in 3 cities of 3 FDs (Far-Eastern, Southern and North-Western),
- 4 (0.3%) influenza B cases in 3 cities of Far-Eastern and North-Western FDs.
Rate of PCR diagnosis of other respiratory infections was estimated as 23.1% including parainfluenza in 9.3%, adenovirus infection in 3.1%, RSV infection in 10.7% (table 3).
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 3.1%, for parainfluenza, adenovirus and RSV in total - as 23.1% (PCR) and 30.2% (IFA) .
Sentinel surveillance. Clinical samples from 34 SARI patients and 43 ILI/ARI patients were investigated by rRT-PCR, one influenza A(H3N2) case was detected among ILI/ARI patients.
Antigenic and genetic characterization. The first influenza A(H3N2) virus isolated in Astrakhan was antigenically related to A/Perth/16/09 virus. As a result of genetic characterization this virus was determined as related to influenza H3 clade A/Victoria/208/2009. All 3 investigated influenza B viruses isolated in Novosibirsk were antigenically characterized as belonging to B/Yamagata lineage.
Susceptibility to antiviral drugs.
According to molecular-genetic results one investigated influenza A(H3N2) virus appeared to be susceptible to oseltamivir.
http://www.influenza.spb.ru/en/influ...mic_situation/
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Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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February 17th, 2012, 02:43 PM
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Editor, Senior Moderator
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Re: Russia ILI surveillance 2011-2012
Week 06.02.2012-12.02.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show low influenza activity in Russia although gradual growth of morbidity was registered in some cities. Epidemic thresholds of morbidity were exceeded in 3 cities of Far-Eastern, Siberian and Nort-Western FDs. The nationwide ILI & ARI morbidity level registered this week was above the national baseline by 4.2%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 54 RBLs. According to these data as a result of investigation of 1939 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 5.1% including 0.1% for influenza A(H1N1)pdm09 virus, 2.7% for A(H3N2) virus, 0.9% for non subtyped influenza A virus and 1.4% for influenza B virus (table 4).
Influenza Virus Isolation
During the reported week (February 06 - 12. 2012) investigations on influenza virus isolation were conducted in 17 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 238 clinical samples testing 9 (3.8%) viruses were isolated including 7 (2.9%) influenza A(H3N2) viruses in cities located in Far-Eastern Federal District (FD), North-Western and Central FD and 2 (0.8%) influenza B viruses in two cities of Far-Eastern and Central FD (table 1).
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 1022 patients with ILI and ARI were investigated in 43 RBLs by IFA by direct detection of antigens in clinical samples. A total of 34 (3.3%) influenza cases were detected including:
- 26 (2.5%) influenza A(H3N2) cases in 11 cities of Siberian, North-Western, Volga, Southern and Central FD,
- 8 (0.8%) influenza B cases in 6 cities of Far-Eastern, Siberian, North-Western and Central FD.
Non-influenza respiratory viruses caused 24.6% of all investigated ILI and ARI cases including 14.0%, 5.5% and 5.1% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 48 RBLs. A total of 70 influenza cases were detected including:
- 2 (0.2%) influenza A(H1N1)pdm09 case in Voronezh (Central FD),
- 31 (3.7%) influenza A(H3N2) cases in 18 cities of all 7 FDs,
- 17 (1.3%) non subtyped Influenza A cases in Moscow,
- 20 (1.5%) influenza B cases in 8 cities of 4 FDs (Far-Eastern,North-Western, Southern and Central).
Rate of PCR diagnosis of other respiratory infections was estimated as 18.5% including parainfluenza in 7.0%, adenovirus infection in 5.7%, RSV infection in 5.8% (table 3).
Conclusion
Influenza and ARI morbidity data. Clinical and epidemiological data show low influenza activity in Russia although gradual growth of morbidity was registered in some cities. Epidemic thresholds of morbidity were exceeded in 3 cities of Far-Eastern, Siberian and Nort-Western FDs. The nationwide ILI & ARI morbidity level registered this week was above the national baseline by 4.2%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 5.1%, for parainfluenza, adenovirus and RSV in total - as 18.5% (PCR) and 24.6% (IFA) .
Sentinel surveillance. Clinical samples from 95 patients were investigated by rRT-PCR. As result 3 influenza A(H3N2) cases were detected among 31 SARI patients and one influenza A(H3N2) case was detected among 64 ILI/ARI patients.
Antigenic and genetic characterization. The second influenza A(H3N2) virus isolated in St.- Petersburg was antigenically related to A/Perth/16/09 virus. All 3 investigated influenza B viruses isolated in Novosibirsk were antigenically characterized as belonging to B/Yamagata lineage.
Susceptibility to antiviral drugs.
According to molecular-genetic results one investigated influenza A(H3N2) virus appeared to be susceptible to oseltamivir.
http://www.influenza.spb.ru/en/influ...mic_situation/
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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February 25th, 2012, 05:11 AM
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Editor, Senior Moderator
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Join Date: Aug 2009
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Re: Russia ILI surveillance 2011-2012
Week 13.02.2012-19.02.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show low influenza activity in Russia although gradual growth of morbidity continued to be registered in some cities. Epidemic thresholds of morbidity were exceeded in 3 cities of Far-Eastern, Siberian and Nort-Western FDs. The nationwide ILI & ARI morbidity level registered this week was above the national baseline by 8.9%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 52 RBLs. According to these data as a result of investigation of 2062 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 6.0% including 0.2% for influenza A(H1N1)pdm09 virus, 3.8% for influenza A(H3N2) virus, 1.4% for non subtyped influenza A virus and 0.9% for influenza B virus (table 4).
Influenza Virus Isolation
During the reported week (February 13 - 19. 2012) investigations on influenza virus isolation were conducted in 18 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 290 clinical samples testing 26 (9.0%) viruses were isolated including 22 (7.6%) influenza A(H3N2) viruses in cities located in Far-Eastern, Siberian, North-Western and Central Federal District (FD) and 4 (1.4%) influenza B viruses were isolated in cities of Far-Eastern and Central FD (table 1).
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 1163 patients with ILI and ARI were investigated in 42 RBLs by IFA detection of antigens in clinical samples. A total of 30 (2.6%) influenza cases were detected including:
- 27 (2.3%) influenza A(H3N2) cases in 13 cities of Siberian, North-Western, Volga, Southern and Central FD,
- 3 (0.3%) influenza B cases in 2 cities of Siberian and Central FD.
Non-influenza respiratory viruses caused 25.7% of all investigated ILI and ARI cases including 13.3%, 5.6% and 6.8% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 50 RBLs. A total of 101 influenza cases were detected including:
- 5 (0.5%) influenza A(H1N1)pdm09 cases in 3 cities of Siberian and North-Western FD,
- 52 (5.9%) influenza A(H3N2) cases in 19 cities of all 7 FDs,
- 29 (2.1%) non subtyped influenza A cases in 5 cities of Siberian, Volga, Central, Ural and North-Western FD,
- 15 (1.1%) influenza B cases in 6 cities of 3 FDs (Far-Eastern, Siberian and Central).
Rate of PCR diagnosis of other respiratory infections was estimated as 16.0% including parainfluenza in 6.7%, adenovirus infection in 3.3%, RSV infection in 6.0% (table 3).
...
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 6.0%, for parainfluenza, adenovirus and RSV in total - as 16.0% (PCR) and 25.7% (IFA) .
Sentinel surveillance. Clinical samples from 79 patients were investigated by rRT-PCR. As result 6 influenza A(H3N2) cases, 1 influenza A(H1N1)pdm09 case and 2 influenza B cases were detected among 34 SARI patients. One influenza A(H3N2) case and one influenza B case were detected among 45 ILI/ARI patients.
Antigenic and genetic characterization. The second influenza A(H3N2) virus isolated in St.- Petersburg was antigenically related to A/Perth/16/09 virus. All 3 investigated influenza B viruses isolated in Novosibirsk were antigenically characterized as belonging to B/Yamagata lineage.
Susceptibility to antiviral drugs.
According to molecular-genetic results one investigated influenza A(H3N2) virus and 3 influenza B viruses appeared to be susceptible to oseltamivir.
http://www.influenza.spb.ru/en/influ...mic_situation/
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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March 7th, 2012, 05:33 AM
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Editor, Senior Moderator
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Re: Russia ILI surveillance 2011-2012
Week 9 report was not released - straight to week 10.
Influenza and ARI morbidity data
Clinical and epidemiological data show that influenza activity increased in Russia. Epidemics thresholds of morbidity were exceeded in 9 citiy of different FDs. The nationwide ILI & ARI morbidity level registered this week was above the national baseline by 14.7%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 49 RBLs. According to these data as a result of investigation of 1973 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 15.0% including 0.3% for influenza A(H1N1)pdm09 virus, 12.4% for influenza A(H3N2) virus, 0.4% for non subtyped influenza A virus and 1.9% for influenza B virus (table 4).
...
Influenza Virus Isolation
During the reported week (February 27 -March 4. 2012) investigations on influenza virus isolation were conducted in 6 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 314 clinical samples testing 29 (9.2%) viruses were isolated including 25 (8.0%) influenza A(H3N2) viruses in cities located in Far-Eastern, Siberian, North-Western, Volga and Central Federal Districts (FD), 1 (0.3%) influenza A(H1N1)pdm09 virus in Siberian and 2 (0.6%) influenza B viruses in Far-Eastern and Central FDs (table 1).
...
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 1011 patients with ILI and ARI were investigated in 41 RBLs by IFA detection of antigens in clinical samples. A total of 58 (5.7%) influenza cases were detected including:
- 50 (4.9%) influenza A(H3N2) cases in 16 cities of different FDs,
- 6 (0.6%) influenza A(H1N1)pdm09 cases in 2 cities of Siberian and North-Western FDs,
- 2 (0.2%) influenza B cases in 2 cities of Siberian and North-Western FDs.
Non-influenza respiratory viruses caused 24.6% of all investigated ILI and ARI cases including 12.9%, 4.5% and 7.2% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
...
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 48 RBLs. A total of 275 influenza cases were detected including:
- 6 (0.5%) influenza A(H1N1)pdm09 cases in 4 cities of Siberian, North-Western, Volga and Far Eastern FDs,
- 212 (17.6%) influenza A(H3N2) cases in 33 cities of all 7 FDs,
- 19 (1.7%) non subtyped influenza A cases in 6 cities of Siberian, Central and North-Western FDs,
- 38 (2.7%) influenza B cases in 12 cities of 5 FDs (Far-Eastern, Siberian, North-Western, Volga and Central).
Rate of PCR diagnosis of other respiratory infections was estimated as 14.7% including parainfluenza in 6.4%, adenovirus infection in 2.8%, RSV infection in 5.5% (table 3).
...
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 15%, for parainfluenza, adenovirus and RSV in total - as 14.7% (PCR) and 24.6% (IFA) .
Sentinel surveillance. Clinical samples from 97 patients were investigated by rRT-PCR. As a result 11 influenza cases were detected among 38 SARI patients, including 6 cases of A(H3N2), 2 cases of A(H1N1)pdm09, two cases of B and 1 case of A non subtyped. Six influenza A(H3N2) cases and three influenza B cases were detected among 52 ILI/ARI patients.
Antigenic and genetic characterization. Twenty one influenza A(H3N2) viruses were antigenically related to A/Perth/16/09 virus. All 3 investigated influenza B viruses isolated in Novosibirsk were antigenically characterized as belonging to B/Yamagata lineage, 3 influenza B viruses isolated in Moscow were antigenically characterized as belonging to B/Victoria lineage. One A(H1N1)pdm09 virus was antigenically characterized as A/California/7/09-like.
Susceptibility to antiviral drugs.
According to molecular-genetic results three investigated influenza A(H3N2) virus and 3 influenza B viruses appeared to be susceptible to oseltamivir.
http://www.influenza.spb.ru/en/influ...mic_situation/
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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March 15th, 2012, 02:06 PM
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Editor, Senior Moderator
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Re: Russia ILI surveillance 2011-2012
Week 11 05.03.2012-11.03.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show decrease of registered influenza and ARVI cases as a result of holidays in Russia. Epidemics thresholds of morbidity were exceeded in 5 cities of different FDs. The nationwide ILI & ARI morbidity level registered this week was below the national baseline by 2.3%.
...
http://www.influenza.spb.ru/en/influ...mic_situation/
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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March 24th, 2012, 05:22 AM
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Editor, Senior Moderator
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Re: Russia ILI surveillance 2011-2012
Influenza and ARI morbidity data
Clinical and epidemiological data show increase influenza and ARVI morbidity level in Russia. The nationwide ILI & ARI morbidity level registered this week was above the national baseline by 8.1%.
Conclusion
Influenza and ARI morbidity data. Clinical and epidemiological data show increase influenza and ARVI morbidity level in Russia. The nationwide ILI & ARI morbidity level registered this week was above the national baseline by 8.1%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 18.9%, for parainfluenza, adenovirus and RSV in total - as 13.4% (PCR) and 23.0% (IFA) .
Sentinel surveillance. Clinical samples from 85 patients were investigated by rRT-PCR. As a result 13 (32.5%) of A(H3N2) influenza cases were detected among 40 SARI patients, 6 (13.3%) influenza A(H3N2) cases and 5 (11.1%) influenza B cases were detected among 45 ILI/ARI patients.
Antigenic and genetic characterization. Thirty one influenza A(H3N2) viruses were antigenically related to A/Perth/16/09 virus. All 3 investigated influenza B viruses isolated in Novosibirsk were antigenically characterized as belonging to B/Yamagata lineage, 3 influenza B viruses isolated in Moscow were antigenically characterized as belonging to B/Victoria lineage. One A(H1N1)pdm09 virus was antigenically characterized as A/California/7/09-like.
Susceptibility to antiviral drugs.
According to molecular-genetic results 9 investigated influenza A(H3N2) viruses and 3 influenza B viruses appeared to be susceptible to oseltamivir. Manana-test investigations showed that 16 influenza A(H3N2) viruses were susceptible to oseltamivir.
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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March 30th, 2012, 05:29 AM
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Editor, Senior Moderator
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Re: Russia ILI surveillance 2011-2012
Week 13 19.03.2012-25.03.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show increase influenza and ARVI morbidity level in Russia. The nationwide ILI & ARI morbidity level registered this week was above the national baseline by 10.2%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 52 RBLs. According to these data as a result of investigation of 2337 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 20.1% including 0.4% for influenza A(H1N1)pdm09 virus, 14.1% for influenza A(H3N2) virus, 1.4% for non subtyped influenza A virus and 3.8% for influenza B virus (table 4).
Influenza Virus Isolation
During the reported week (March 19 - 25. 2012) investigations of influenza virus isolation were conducted in 22 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 484 clinical samples testing 33 (6.8%) viruses were isolated including 17 (3.5%) influenza A(H3N2) viruses in cities located in Siberian, Central, North-Western and South Federal Districts (FD) and 16 (3.3%) influenza B viruses in Siberian, Central, North-Western and Far-Eastern FDs (table 1).
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 1252 patients with ILI and ARI were investigated in 44 RBLs by IFA detection of antigens in clinical samples. A total of 109 (8.7%) influenza cases were detected including:
- 90 (7.2%) influenza A(H3N2) cases in 25 cities of different FDs,
- 9 (0.7%) influenza A(H1N1)pdm09 cases in 1 city of North-Western FD,
- 10 (0.8%) influenza B cases in 5 cities of Siberian, Central, Volga and Far-Eastern FDs.
Non-influenza respiratory viruses caused 23.3% of all investigated ILI and ARI cases including 12.9%, 4.6% and 5.8% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 50 RBLs. A total of 399 influenza cases were detected including:
- 9 (0.6%) influenza A(H1N1)pdm09 cases in 6 cities of Siberian, Ural, South, Volga, North-Western and Central FDs,
- 274 (17.2%) influenza A(H3N2) cases in 45 cities of all 7 FDs,
- 49 (3.5%) non subtyped influenza A cases in 3 cities of 3 FDs,
- 67 (4.2%) influenza B cases in 17 cities of 6 FDs (Far-Eastern, Siberian, North-Western, South, Volga and Central).
Rate of PCR diagnosis of other respiratory infections was estimated as 10.7% including parainfluenza in 6.5%, adenovirus infection in 2.7%, RSV infection in 1.5% (table 3).
Conclusion
Influenza and ARI morbidity data. Clinical and epidemiological data show increase influenza and ARVI morbidity level in Russia. The nationwide ILI & ARI morbidity level registered this week was above the national baseline by 10.2%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 20.1%, for parainfluenza, adenovirus and RSV in total - as 10.7% (PCR) and 23.3% (IFA) .
Sentinel surveillance. Clinical samples from 90 patients were investigated by rRT-PCR. As a result 19 (47.5%) influenza cases were detected among 40 SARI patients including 17 (42.5%) influenza A(H3N2)cases and 2 (5.0%) influenza B cases. 13 (25.5%) influenza cases were detected among 51 ILI/ARI patients including 4 (7.8%%) influenza A(H3N2) cases and 9 (17.6%) influenza B cases.
Antigenic and genetic characterization. 69 investigated influenza A(H3N2) viruses were antigenically related to A/Perth/16/09 virus or A/Victoria/208/09. Seven investigated influenza B viruses isolated in Novosibirsk, Moscow and Vladivostok were antigenically characterized as belonging to B/Yamagata lineage, 11 influenza B viruses isolated in Moscow and St.-Petersburg were antigenically characterized as belonging to B/Victoria lineage. One A(H1N1)pdm09 virus was antigenically related to A/California/7/09 virus.
Susceptibility to antiviral drugs.
According to molecular-genetic results 9 investigated influenza A(H3N2) viruses and 3 influenza B viruses appeared to be susceptible to oseltamivir. Manana-test investigations showed that 16 influenza A(H3N2) viruses were susceptible to oseltamivir.
http://www.influenza.spb.ru/en/influ...mic_situation/
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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April 6th, 2012, 09:25 AM
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Re: Russia ILI surveillance 2011-2012
Week 14 26.03.2012-01.04.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show some decrease of influenza and ARVI morbidity level in Russia. The nationwide ILI & ARI morbidity level registered this week was above the national baseline by 4.7%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 54 RBLs. According to these data as a result of investigation of 2481 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 22.0% including 0.6% for influenza A(H1N1)pdm09 virus, 17.0% for influenza A(H3N2) virus, 0.8% for non subtyped influenza A virus and 3.7% for influenza B virus (table 4).
...
Influenza Virus Isolation
During the reported week (March 26 - April 01. 2012) investigations on influenza virus isolation were conducted in 25 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 455 clinical samples testing 75 (16.5%) viruses were isolated including 57 (12.5%) influenza A(H3N2) viruses in cities located in all seven Federal Districts (FD), 7 (1.5%) influenza A(H1N1)pdm09 viruses in two sities of Central and Far-Eastern FDs and 11 (2.4%) influenza B viruses in three sities of North-Western and Far-Eastern FDs (table 1).
green = B; Blue = A/H1N1; Red = A/H3N2; Tan = A/H1N1pdm09
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 1330 patients with ILI and ARI were investigated in 46 RBLs by IFA detection of antigens in clinical samples. A total of 146 (11.0%) influenza cases were detected including:
- 127 (9.5%) influenza A(H3N2) cases in 24 cities of different FDs,
- 6 (0.5%) influenza A(H1N1)pdm09 cases in 1 city of North-Western FD,
- 13 (1.0%) influenza B cases in 8 cities of Siberian, Central, Volga and North-Western FDs.
Non-influenza respiratory viruses caused 20.0% of all investigated ILI and ARI cases including 9.5%, 6.5% and 4.0% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
...
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 51 RBLs. A total of 446 influenza cases were detected including:
- 12 (0.9%) influenza A(H1N1)pdm09 cases in 9 cities of Far-Eastern, Siberian, Ural, South, Volga and Central FDs,
- 350 (21.8%) influenza A(H3N2) cases in 46 cities of all 7 FDs,
- 15 (1.0%) non subtyped influenza A cases in 5 cities of 5 FDs,
- 69 (4.1%) influenza B cases in 15 cities of 5 FDs (Far-Eastern, Siberian, North-Western, Volga and Central).
Rate of PCR diagnosis of other respiratory infections was estimated as 12.3% including parainfluenza in 8.3%, adenovirus infection in 1.9%, RSV infection in 2.1% (table 3).
...
Conclusion
Influenza and ARI morbidity data. Clinical and epidemiological data show some decrease of influenza and ARVI morbidity level in Russia. The nationwide ILI & ARI morbidity level registered this week was above the national baseline by 4.7%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 22.0%, for parainfluenza, adenovirus and RSV in total - as 12.3% (PCR) and 20.0% (IFA) .
Sentinel surveillance. Clinical samples from 83 patients with SARI and ILI/ARI were investigated by rRT-PCR. As a result 16 (48.5%) influenza cases were detected among 33 SARI patients including 13 (39.4%) influenza A(H3N2) cases, 1 (3.0%) influenza A(H1N1)pdm09 case and 2 (6.1%) influenza B cases. Among 50 ILI/ARI patients 7 (14.0%) influenza cases were detected including 4 (8.0%) influenza A(H3N2) cases and 3 (6.0%) influenza B cases.
Antigenic and genetic characterization. 83 investigated influenza A(H3N2) viruses were antigenically related to A/Perth/16/09 virus or A/Victoria/208/09. Eight investigated influenza B viruses isolated in Novosibirsk, Moscow, St.-Petersburg and Vladivostok were antigenically characterized as belonging to B/Yamagata lineage, 14 influenza B viruses isolated in Moscow and St.-Petersburg were antigenically characterized as belonging to B/Victoria lineage. Three A(H1N1)pdm09 viruses were antigenically related to A/California/7/09 virus.
As a result of genetic characterization 3 A(H3N2) viruses were determined as related to A/Victoria/208/2009 clade, 6 A(H3N2) viruses were belonged to clade A/Victoria/208/09 -A/Stockholm/18/2011, 2 strains were determined as related to clade A/Victoria/208/2009 -A/Irak/7/2011. One influenza A(H1N1)pdm09 viruses was determined as related to group A(H1)pdm09, represented by A/St. Peterburg/27/2011 virus.
According to molecular-genetic results 9 investigated influenza A(H3N2) viruses and 3 influenza B viruses appeared to be susceptible to oseltamivir. Manana-test investigations showed that 23 influenza A(H3N2) viruses and 3 influenza B viruses were susceptible to oseltamivir.
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The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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April 13th, 2012, 05:28 PM
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Re: Russia ILI surveillance 2011-2012
Week 15 Week 02.04.2012-08.04.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show decrease of influenza and ARVI morbidity level in Russia. The nationwide ILI & ARI morbidity level registered this week became lower the national baseline by 2.3%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 54 RBLs. According to these data as a result of investigation of 2440 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 17.5% including 0.08% for influenza A(H1N1)pdm09 virus, 13.3% for influenza A(H3N2) virus, 0.2% for non subtyped influenza A virus and 4.0% for influenza B virus (table 4).
Influenza Virus Isolation
During the reported week (April 02 - 08. 2012) investigations on influenza virus isolation were conducted in 22 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 455 clinical samples testing 40 (8.8%) viruses were isolated including 23 (5.1%) influenza A(H3N2) viruses in cities located in six Federal Districts (FD) (Far-Eastern, Siberian, Central, Volga, South and North-Western) and 17 (3.7%) influenza B viruses in six sities of North-Western, Central, Siberian and Far-Eastern FDs (table 1).
green = B; Blue = A/H1N1; Red = A/H3N2; Tan = A/H1N1pdm09
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 1263 patients with ILI and ARI were investigated in 46 RBLs by IFA detection of antigens in clinical samples. A total of 141 (11.2%) influenza cases were detected including:
- 108 (8.6%) influenza A(H3N2) cases in 25 cities of different FDs,
- 11 (0.9%) influenza A(H1N1)pdm09 cases in 3 cities of North-Western, Volga and Far-Eastern FDs,
- 22 (1.7%) influenza B cases in 9 cities of 5 FDs (Far-Eastern, Siberian, Central, Volga and North-Western).
Non-influenza respiratory viruses caused 22.6% of all investigated ILI and ARI cases including 11.9%, 5.9% and 4.8% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2)
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 51 RBLs. A total of 365 influenza cases were detected including:
- 2 (0.2%) influenza A(H1N1)pdm09 cases in 2 cities of North-Western and Central FDs,
- 272 (17.0%) influenza A(H3N2) cases in 46 cities of all 7 FDs,
- 18 (1.0%) non subtyped influenza A cases in 4 cities of 3 FDs,
-73 (4.4%) influenza B cases in 20 cities of 6 FDs (Far-Eastern, Siberian, North-Western, Sought, Volga and Central).
Rate of PCR diagnosis of other respiratory infections was estimated as 10.5% including parainfluenza in 5.6%, adenovirus infection in 2.3%, RSV infection in 2.6% (table 3).
Conclusion
Influenza and ARI morbidity data. Clinical and epidemiological data show decrease of influenza and ARVI morbidity level in Russia. The nationwide ILI & ARI morbidity level registered this week became lower the national baseline by 2.3%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 17.5%, for parainfluenza, adenovirus and RSV in total - as 10.5% (PCR) and 22.6% (IFA) .
Sentinel surveillance. Clinical samples from 104 patients with SARI and ILI/ARI were investigated by rRT-PCR. As a result 12 (29.2%) influenza cases were detected among 41 SARI patients including 9 (22.0%) influenza A(H3N2) cases, 1 (2.4%) influenza A(H1N1)pdm09 case and 2 (4.9%) influenza B cases. Among 63 ILI/ARI patients 15 (23.8%) influenza cases were detected including 13 (20.6%) influenza A(H3N2) cases and 2 (3.2%) influenza B cases.
Antigenic and genetic characterization. 102 investigated influenza A(H3N2) viruses were antigenically related to A/Perth/16/09 virus or A/Victoria/208/09. Eight investigated influenza B viruses isolated in Novosibirsk, Moscow, St.-Petersburg and Vladivostok were antigenically characterized as belonging to B/Yamagata lineage, 18 influenza B viruses isolated in Moscow and St.-Petersburg were antigenically characterized as belonging to B/Victoria lineage. Three A(H1N1)pdm09 viruses were antigenically related to A/California/7/09 virus.
As a result of genetic characterization 3 A(H3N2) viruses were determined as related to A/Victoria/208/2009 clade, 6 A(H3N2) viruses were belonged to clade A/Victoria/208/09 -A/Stockholm/18/2011, 2 strains were determined as related to clade A/Victoria/208/2009 -A/Irak/7/2011. One influenza A(H1N1)pdm09 virus was determined as related to group A(H1)pdm09, represented by A/St. Peterburg/27/2011 virus.
According to molecular-genetic results 21 investigated influenza A(H3N2) viruses, 3 influenza A(H1N1)pdm09 viruses and 3 influenza B viruses appeared to be susceptible to oseltamivir. Munana-test investigations showed that 24 influenza A(H3N2) viruses and 3 influenza B viruses were susceptible to oseltamivir.
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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April 19th, 2012, 05:12 PM
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Editor, Senior Moderator
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Join Date: Aug 2009
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Re: Russia ILI surveillance 2011-2012
Week 16 09.04.2012-15.04.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show decrease of influenza and ARVI morbidity level in Russia. The nationwide ILI & ARI morbidity level registered this week became lower the national baseline by 5.4%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 54 RBLs. According to these data as a result of investigation of 2170 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 18.4% including 0.3% for influenza A(H1N1)pdm09 virus, 14.2% for influenza A(H3N2) virus, 0.2% for non subtyped influenza A virus and 3.7% for influenza B virus (table 4).
Influenza Virus Isolation
During the reported week (April 09 - 15. 2012) investigations on influenza virus isolation were conducted in 23 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 440 clinical samples testing 47 (10.7%) viruses were isolated including 40 (9.1%) influenza A(H3N2) viruses in cities located in all 7 Federal Districts (FD) and 7 (1.6%) influenza B viruses in 3 cities of Central, Siberian and Far-Eastern FDs (table 1).
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 1151 patients with ILI and ARI were investigated in 45 RBLs by IFA detection of antigens in clinical samples. A total of 117 (10.2%) influenza cases were detected including:
- 106 (9.2%) influenza A(H3N2) cases in 23 cities of all 7 FDs (Far-Eastern, Siberian, Ural, Central, South, Volga and North-Western),
- 11 (1.0%) influenza B cases in 8 cities of all FDs.
Non-influenza respiratory viruses caused 21.8% of all investigated ILI and ARI cases including 10.0%, 6.7% and 5.1% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 50 RBLs. A total of 330 influenza cases were detected including:
- 6 (0.6%) influenza A(H1N1)pdm09 cases in 3 cities of North-Western and Far-Eastern FDs,
- 246 (18.0%) influenza A(H3N2) cases in 43 cities of all 7 FDs,
- 7 (0.7%) non subtyped influenza A cases in 2 cities of 2 FDs,
- 71 (5.1%) influenza B cases in 17 cities of 5 FDs (Far-Eastern, Siberian, North-Western, Volga and Central).
Rate of PCR diagnosis of other respiratory infections was estimated as 12.6% including parainfluenza in 7.8%, adenovirus infection in 2.1%, RSV infection in 2.7% (table 3).
Conclusion
Influenza and ARI morbidity data. Clinical and epidemiological data show decrease of influenza and ARVI morbidity level in Russia. The nationwide ILI & ARI morbidity level registered this week became lower the national baseline by 5.4%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 18.4%, for parainfluenza, adenovirus and RSV in total - as 12.6% (PCR) and 21.8% (IFA) .
Sentinel surveillance. Clinical samples from 83 patients with SARI and ILI/ARI were investigated by rRT-PCR. As a result 9 (25.7%) influenza cases were detected among 35 SARI patients including 5 (14.3%) influenza A(H3N2) cases, 1 (2.9%) influenza A(H1N1)pdm09 case and 3 (8.6%) influenza B cases. Among 48 ILI/ARI patients 13 (27.1%) influenza cases were detected including 8 (16.7%) influenza A(H3N2) cases, 1 (2.1%) influenza A(H1N1)pdm09 case and 4 (3.8%) influenza B cases.
Antigenic characterization. A total of 157 influenza viruses were characterized antigenically. 125 investigated influenza A(H3N2) viruses were related to A/Perth/16/09 virus or A/Victoria/208/09. Ten investigated influenza B viruses isolated in Novosibirsk, Moscow, St.-Petersburg and Vladivostok were antigenically characterized as belonging to B/Yamagata lineage, 19 influenza B viruses isolated in Moscow and St.-Petersburg were characterized as belonging to B/Victoria lineage. Three A(H1N1)pdm09 viruses were related to A/California/7/09 virus.
As a result of genetic characterization 3 A(H3N2) viruses were determined as related to A/Victoria/208/2009 clade, 6 A(H3N2) viruses were belonged to clade A/Victoria/208/09 -A/Stockholm/18/2011, 2 strains were determined as related to clade A/Victoria/208/2009 -A/Irak/7/2011. One influenza A(H1N1)pdm09 virus was determined as related to group A(H1)pdm09, represented by A/St. Peterburg/27/2011 virus.
Susceptibility of new viruses to antivirals. By genetic analysis 42 investigated influenza A(H3N2) viruses, 3 influenza A(H1N1)pdm09 viruses and 5 influenza B viruses appeared to be susceptible to oseltamivir. Munana-test investigations showed that 30 influenza A(H3N2) viruses and 5 influenza B viruses were susceptible to oseltamivir. According to results of inhibition of virus reproduction in MDCK cells all investigated 30 influenza A(H3N2) viruses were resistant to rimantadine.
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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April 30th, 2012, 05:16 AM
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Re: Russia ILI surveillance 2011-2012
Week 17 16.04.2012-22.04.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show slight decrease of influenza and ARI morbidity level in Russia although epidemic thresholds for separate cities were exeeded by 21-41% in ten cities of Far-Eastern, Siberian, North-Western and Central FDs. The nationwide ILI & ARI morbidity level registered this week was lower the national baseline by 9.0%.
Cumulative number of diagnosed influenza cases
Cumulative results of influenza diagnosis by different tests were submitted by 54 RBLs. According to these data as a result of investigation of 2191 patients the overall proportion of respiratory samples positive for influenza virus was estimated as 17.3% including 0.05% for influenza A(H1N1)pdm09 virus, 12.2% for influenza A(H3N2) virus, 1.2% for non subtyped influenza A virus and 3.9% for influenza B virus (table 4).
...
Influenza Virus Isolation
During the reported week (April 16 - 22. 2012) investigations on influenza virus isolation were conducted in 24 Regional Base Laboratories (RBLs) participating in influenza surveillance in collaboration with two WHO NICs of Russia. As a result of 493 clinical samples testing 55 (11.2%) viruses were isolated, among them 31 (56.4%) influenza A(H3N2) viruses were reported from 7 cities located in 5 Federal Districts (FD): North-Western, Central, Volga, Siberian and Far-Eastern and 24 (43.6%) influenza B viruses from 6 cities of 4 FDs (North-Western, Central, Siberian and Far-Eastern) (table 1).
...
Influenza Virus Antigen Detection by Immunofluorescence Assay (IFA)
Clinical specimens from 1152 patients with ILI and ARI were investigated in 46 RBLs by IFA detection of antigens in clinical samples. A total of 91 (7.9%) influenza cases were detected including:
- 74 (6.4%) influenza A(H3N2) cases in 20 cities of 6 FDs (Far-Eastern, Siberian, Central, South, Volga and North-Western),
- 1 (0.09%) influenza A(H1N1)pdm09 case in one city of South FD,
- 16 (1.4%) influenza B cases in 10 cities of 5 FDs (Siberian, Central, Volga, South and North-Western).
Non-influenza respiratory viruses caused 21.2% of all investigated ARI cases including 9.5%, 7.3% and 4.4% for parainfluenza, adeno- and RS-viruses, correspondingly (table 2).
...
Influenza Virus RNA Detection by RT-PCR
Clinical samples from SARI, ILI and ARI patients were investigated by RT-PCR in 53 RBLs. A total of 321 influenza cases were detected including:
- 1 (0.09%) influenza A(H1N1)pdm09 case in the city of Far-Eastern FD,
- 223 (16.1%) influenza A(H3N2) cases in 42 cities of all 7 FDs,
- 31 (2.8%) non subtyped influenza A cases in 6 cities of 4 FDs,
- 66 (4.6%) influenza B cases in 18 cities of 6 FDs (Far-Eastern, Siberian, North-Western, Volga, South and Central).
Rate of PCR diagnosis of other respiratory infections was estimated as 9.4% including parainfluenza in 6.2%, adenovirus infection in 1.3%, RSV infection in 1.9% of investigated patients (table 3).
...
Conclusion
Influenza and ARI morbidity data. Clinical and epidemiological data show slight decrease of influenza and ARI morbidity level in Russia although epidemic thresholds for separate cities were exeeded by 21-41% in ten cities of Far-Eastern, Siberian, North-Western and Central FDs. The nationwide ILI & ARI morbidity level registered this week was lower the national baseline by 9.0%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 17.3%, for parainfluenza, adenovirus and RSV in total - as 9.4% (PCR) and 21.2% (IFA).
Sentinel surveillance. Clinical samples from 78 patients with SARI and ILI/ARI were investigated by rRT-PCR. As a result 10 (41.7%) influenza cases were detected among 24 SARI patients including 7 (29.2%) influenza A(H3N2) cases and 3 (12.5%) influenza B cases. Among 54 ILI/ARI patients 8 (14.8%) influenza cases were detected including 5 (9.3%) influenza A(H3N2) cases and 3 (5.6%) influenza B cases.
Antigenic characterization. A total of 182 influenza viruses were characterized antigenically. 137 investigated influenza A(H3N2) viruses were related to A/Perth/16/09 virus or A/Victoria/208/09. Nine investigated influenza B viruses isolated in Novosibirsk, Moscow, St.-Petersburg and Vladivostok were antigenically characterized as belonging to B/Yamagata lineage, 31 influenza B viruses were characterized as belonging to B/Victoria lineage. Five influenza A(H1N1)pdm09 viruses were related to A/California/7/09 virus.
As a result of genetic characterization 3 influenza A(H3N2) viruses were determined as related to A/Victoria/208/2009 clade, 6 influenza A(H3N2) viruses were belonged to clade A/Victoria/208/09 -A/Stockholm/18/2011, 2 strains were determined as related to clade A/Victoria/208/2009 -A/Irak/7/2011. One influenza A(H1N1)pdm09 virus was determined as related to group A(H1)pdm09, represented by A/St. Peterburg/27/2011 virus.
Susceptibility of new viruses to antivirals. By genetic analysis all 42 investigated in two NICs influenza A(H3N2) viruses, 3 influenza A(H1N1)pdm09 viruses and 5 influenza B viruses appeared to be susceptible to oseltamivir. Munana-test investigations in St.-Petersburg NIC showed that 42 influenza A(H3N2) viruses and 5 influenza B viruses were susceptible to oseltamivir. According to results of inhibition of virus reproduction in MDCK cells all 30 investigated influenza A(H3N2) viruses were resistant to rimantadine.
__________________
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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May 5th, 2012, 06:03 PM
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Editor, Senior Moderator
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Re: Russia ILI surveillance 2011-2012
Week 18
Week 23.04.2012-29.04.2012
Influenza and ARI morbidity data
Clinical and epidemiological data show further decrease of influenza and ARI morbidity level in Russia although epidemic thresholds for separate cities were exeeded by 21-52% in ten cities of Far-Eastern, Siberian, Ural, North-Western and Central FDs. The nationwide ILI & ARI morbidity level registered this week was lower the national baseline by 14.1%.
...
Conclusion
Influenza and ARI morbidity data. Clinical and epidemiological data show further decrease of influenza and ARI morbidity level in Russia although epidemic thresholds for separate cities were exeeded by 21-52% in ten cities of Far-Eastern, Siberian, Ural, North-Western and Central FDs. The nationwide ILI & ARI morbidity level registered this week was lower the national baseline by 14.1%.
Etiology of ILI & ARI morbidity. The overall proportion of respiratory samples tested positive for influenza by virus isolation, IFA and rRT-PCR was estimated as 13.1%, for parainfluenza, adenovirus and RSV in total - as 9.4% (PCR) and 17.7% (IFA).
Sentinel surveillance. Clinical samples from 71 patients with SARI and ILI/ARI were investigated by rRT-PCR. As a result 6 (20.7%) influenza A(H3N2) cases were detected among 29 SARI patients. Among 42 ILI/ARI patients 5 (11.9%) influenza A(H3N2) cases were detected.
Antigenic characterization. A total of 202 influenza viruses were characterized antigenically. 142 investigated influenza A(H3N2) viruses were related to A/Perth/16/09 virus or A/Victoria/208/09. Nine investigated influenza B viruses isolated in Novosibirsk, Moscow, St.-Petersburg and Vladivostok were antigenically characterized as belonging to B/Yamagata lineage, 46 influenza B viruses were characterized as belonging to B/Victoria lineage. Five influenza A(H1N1)pdm09 viruses were related to A/California/7/09 virus.
As a result of genetic characterization 20 influenza A(H3N2) viruses were determined as related to clade A/Victoria/208/09 - A/Stockholm/18/2011, 2 strains were determined as related to clade A/Victoria/208/2009 - A/Irak/7/2011. One influenza A(H1N1)pdm09 virus was determined as related to group A/St. Peterburg/27/2011 virus. 4 influenza B viruses were determinated as related to B Yamagata lineage, clade B/Bangladesh/3333/2007, one influenza B strain was were determinated as related to B Victoria lineage, clade B/Brisbaine/60/2008.
Susceptibility of new viruses to antivirals. By genetic analysis all 42 investigated in two NICs influenza A(H3N2) viruses, 3 influenza A(H1N1)pdm09 viruses and 5 influenza B viruses appeared to be susceptible to oseltamivir. Munana-test investigations in St.-Petersburg NIC showed that 42 influenza A(H3N2) viruses and 5 influenza B viruses were susceptible to oseltamivir. According to results of inhibition of virus reproduction in MDCK cells all 32 investigated influenza A(H3N2) viruses were resistant to rimantadine.
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