Spain - Influenza Surveillance. Season 2010/2011

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Influenza Surveillance in Spain.

Season 2010/2011 (Week-2)

236,4 cases per 100.000 population.

Increasing trend

Intensity: Medium

Widespread geographic influenza activity



ILI Incidence by age group.

Significant increase of ILI incidence in the age groups 5-14 and over 64




Number of sentinel samples and Viral detection (%).

In the week 2/2011, 352 detections of influenza , 66% from sentinel sources and 34% from non-sentinel sources; 93% have been type A (95% AnH1N1 y 5% not subtyped ), 6,8% have been of the type B and 0,2% type C.





Distribution of viral detection by Subtype.

16 influenza viruses have been characterized by The National Center of Microbiology of the ISCIII (Majadahonda , Madrid) (11 AnH1N1, 3 AH3N2 and 2 B)

All AnH1N1 virus are similar to A/California/07/2009 and all of the H3N2 are similar to A/HongKong/2121/2010







Rate of detection of Influenza and RSV.

Surveillance of Severe Hospitalized Cases and Confirmed with Influenza.



Since the beginning of the season (Week40) there have been 517 severe cases and 24 deaths



Percentage of severe hospitalized cases by age group.

Severe hospitalized cases by Subtype.

Additional Information

So far, with the information available;

22% (85/386) had no risk factors. Total severe hospitalized cases 517.

Vaccinated cases: 41

Unvaccinated cases: 312

*19% of the cases included in the vaccine campaign (Over 60 and other risk factors) were vaccinated.



http://vgripe.isciii.es/gripe/documentos/20102011/boletines/grn022011.pdf

 

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Re: Spain - Influenza Surveillance. Season 2010/2011

Influenza Surveillance in Spain.

Season 2010/2011 (Week 3)​

Evolution of ILI incidence and number of viral detections.

• 226,9 cases per 100.000 population
  
  
  [*]Decreasing Trend
  
  
  [*]Intensity: Medium
  
  
  [*]Widespread influenza activity

Evolution of ILI incidence by Age group.

• Decreasing trend in the age groups; 15-64 and over 64
  
  
  [*]Increasing trend in the age group under 15

Number of sentinel samples tested and percentage of viral detection.

• So far, 59 influenza virus have been characterized (45 pH1N1, 4 A H3N2 and 10 B); Pandemic virus (pH1N1) are similar to A/California/07/2009, A H3N2 virus are related to A/HongKong/2121/2010 and A/Victoria/208/2009, Type B are similar to B/Brisbane/60/2008 (Victorian lineage)

• Two pandemic virus present the mutation in the HA D222G; These samples were taken in earlier January 2011 and they are from a pregnant woman, 32, she presented multi-organ failure. The other case was from a woman, 62, without history of vaccination and with underlying health conditions (lung disease), she presented pneumonia.

Rate of influenza and RSV detection (%).

Surveillance of Severe Hospitalized Cases and Confirmed with Influenza.



Severe hospitalized cases with influenza by subtype and rate of incidence.

Percentage of severe hospitalized cases with influenza by Age group.

Additional Information

• Up to date, 777 severe flu cases have been reported and 54 deaths have been recorded since the beginning of the season (week 40/2010).

• 66 cases were vaccinated
  
  
  [*]416 cases were unvaccinated (86%).
  
  
  [*]*The monovalent vaccine (2009) was administered in 4% of the cases (29/745)

PDF (Spanish) - http://vgripe.isciii.es/gripe/documentos/20102011/boletines/grn032011.pdf

 

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Re: Spain - Influenza Surveillance. Season 2010/2011 (Week 9)

Re: Spain - Influenza Surveillance. Season 2010/2011 (Week 9)

Influenza Surveillance in Spain.

Season 2010/2011 (Week-9)


So far, 139 people have died of swine flu (H1N1) and at least 1,305 severe flu cases have been hospitalized since the beginning of the season.

Out of 845 patients with vaccination status available 121 (12%) were vaccinated, 62 cases took the pandemic monovalent vaccine (2009) . At least 10 vaccinated patient have died of pH1N1.

Two pandemic virus present the mutation in the HA1 region D222G; These samples were taken in earlier January 2011 and they are from a pregnant woman, 32, she presented multi-organ failure. The other case was from a woman, 62, without history of vaccination and with underlying health conditions (lung disease), she presented pneumonia.

45 pH1N1 (NA) sequences were analyzed of which one was carrying the mutation H275Y

In the week 9/2011, there were 53,38 cases per 100.000 compared to 81,66 cases per 100.000 population in previous week (8/2011).

Pie chart showing severe cases confirmed with influenza by age groups, up to week 9/2011

ILI incidence rate, severe hospitalized cases and fatal cases by week.

Intensity (Week 9/2011)

Geographic spread (Week 9/2011)

Weekly Influenza Surveillance Report (week 9/2011) - http://www.isciii.es/htdocs/centros/epidemiologia/pdf/grn092011.pdf




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