Re: Thailand, H5N1 found in chickens
AVIAN INFLUENZA (109)- THAILAND (SUKHOTHAI), UPDATE [ProMedMail.org]
AVIAN INFLUENZA (109)- THAILAND (SUKHOTHAI), UPDATE
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A ProMED-mail post <http: org="">
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Date: Tue 4 Nov 2008
From: Sakchai Sriboonsue <dg@dld.go.th> [edited]
re: ProMED-mail Avian influenza (108): Thailand (Sukhothai) susp, RFI 20081101.3440
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The Department of Livestock Development (DLD) would like to update you with information regarding this article as follows:
On 16 Oct 2008, Sukhothai veterinary officials were notified of suspected cases of HPAI [highly pathogenic avian influenza] according to DLD case definition (a clinically suspected HPAI case for poultry raised in a low biosecurity system is defined as that experiencing 5 per cent mortality within 2 consecutive days) in Paknam sub-district, Sawankalok district, Sukhothai province.
Preliminary investigation revealed that, on 10 Oct 2008, the farmer observed the initial one death out of 14 chickens in an index household.
The cumulative mortality as of 16 Oct 2008 was 5 out of 14.
The abnormal death of poultry was confined within an household.
On the date of discovery, animal health officials commenced control interventions according to national protocols, some of which were
- immediate stamping out: 789 poultry were destroyed, including those remaining of the index household;
- cleaning and disinfection of the index household and surrounding areas;
- village gathering as part of the public communication and education;
- restriction of movement in and out of the affected village;
- submission of samples to responsible laboratory for confirmation.
Surveillance within a 5 km (3.1 mi) radius surrounding the index household has been intensified.
A total of 200 cloacal swabs samples were collected from 50 villages in 5 sub-districts.
Samples were sent to Lower-northern Veterinary Research and Development Center (LN-VRDC).
Results from LN-VRDC for the samples submitted from Sukhothai and other provinces thus far have shown no evidence of HPAI infection.
As a precaution following the preemptive culling policy, an additional 4740 birds from 240 household in 12 villages were destroyed, with 75 per cent compensation (45 Baht or USD 1.3 per kilogram).
From 26 Jan to 31 Oct 2008, DLD received 1293 notifications of sick or dead poultry conforming HPAI suspicions.
All reports were followed by prompt investigation.
The collection of samples for laboratory confirmation was emphasized, if available.
To date, there has been no laboratory evidence of HPAI.
--
Dr Sakchai Sriboonsue Director General Department of Livestock Development Thailand <dg@dld.go.th>
[In ProMED-mail posting 20081101.3440, dated 1 Nov 2008, we commented:
"The current suspected outbreak at Sukhothai province is pending official notification, supported by laboratory confirmation."
The immediate response above from Thailand's official authority with first hand, detailed information, is much appreciated, attesting for Thailand's remarkable transparency regarding its avian influenza situation, as meticulously practised since February 2004.
Thailand has managed to control H5N1 rather effectively following the major outbreak, which severely affected the country during 2004 and 2005.
This was done mainly by the application of stamping out, animal movement measures, and related zoosanitary measures, while officially prohibiting vaccination, and accompanied by extensive surveillance.
Compared to 136 outbreaks in poultry farms during 2005, 2 outbreaks were reported in 2006, and none during 2007. In January-February 2008, single outbreaks were reported from Phichit and Nakhon Sawan. According to the World Organisation for Animal Health (OIE; Office International des Epizooties) WAHID interface, HPAI is not a notifiable animal disease in Thailand.
It would be interesting to note if laboratory tests have been carried out in samples from the affected household to confirm the epidemiological, clinical (and postmortem?) suspicions.
Otherwise, the authorities have treated the event as a suspected outbreak, applying a justifiable severe precautionary disease control policy which included, among others, the stamping out of the index household and the preemptive culling around it. - Mod.AS]
[see also:
Avian influenza (108): Thailand (Sukhothai) susp, RFI 20081101.3440
Avian influenza (36): Thailand, mosquitoes 20080219.0676
Avian influenza (23): India (West Bengal), Thailand (Phichit) 20080126.0328
2007
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Avian influenza (162): Thailand (Phichit) 20070928.3209
Avian influenza (91): Thailand (prevention), Viet Nam 20070528.1711
Avian influenza (12): Hong Kong, Thailand, Japan, OIE 20070118.0237
2006
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Avian influenza (175) - Thailand (Uthai Thani) 20060807.2204
Avian influenza (172) - Thailand (Nakhon Phanom): OIE 20060805.2167
Avian influenza (165) - Thailand: OIE 20060731.2113
Avian influenza (160) - Thailand 20060727.2065
Avian influenza (159) - Thailand, H5N1 confirmed 20060724.2042
2005
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Avian influenza - Eastern Asia (73): Thailand, OIE 20050716.2031
2004
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Avian influenza - Eastern Asia (155): Thailand, OIE 20041226.3416
Avian influenza - Eastern Asia (152): Thailand, vacc. trials 20041225.3413
Avian influenza, Eastern Asia (139): Thailand, tigers, OIE 20041120.3111
Avian influenza - Eastern Asia (136): Thailand, ducks 20041111.3046
Avian influenza - Eastern Asia (131): Thailand, tigers & leopards 20041024.2874
Avian influenza, Eastern Asia (129): Thailand, tigers, OIE 20041022.2865
Avian influenza - Eastern Asia (78): Thailand, cats 20040617.1614
Avian influenza - Thailand: OIE update 20040207.0438
Avian influenza, Thailand - OIE 20040124.0276
Avian influenza, human - Thailand (03) 20040123.0268
Avian influenza, human - Thailand (02): confirmed 20040123.0262
Avian influenza, human - Thailand: suspected 20040122.0247
Avian influenza - Thailand (02): not 20040109.0097
Avian influenza - Thailand: RFI 20040105.0051]
.................arn/mj/sh
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Posted by Giuseppe Michieli at <a class="timestamp-link" href="http://hygimia69.blogspot.com/2008/11/avian-influenza-109-thailand-sukhothai.html" rel="bookmark" title="permanent link"><abbr class="published" title="2008-11-04T17:10:00+01:00">11/04/2008 05:10:00 PM</abbr>