AVIAN INFLUENZA (43): CHINA (QH) POULTRY, WILD BIRDS, OIE

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Date: 4 Jun 2009
Source: OIE WAHID (World Animal Health Information Database) Disease
Information 2009; 22(23) [edited]
<http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=8155>


Highly pathogenic avian influenza, China (People's Rep. of)

Information received on 04 Jun 2009 from Dr Zhang Zhongqui, Deputy
Director General , China Animal Disease Control Centre, Veterinary
Bureau, Beijing, China (People's Rep. of)

Summary
Report type: Follow-up report No. 1
Start date 08 May 2009
Date of first confirmation of the event 17 May 2009
Report date 04 Jun 2009
Date submitted to OIE 04 Jun 2009
Reason for notification: Reoccurrence of a listed disease
Date of previous occurrence June 2006
Manifestation of disease: Clinical disease
Causal agent: Highly pathogenic avian influenza virus
Serotype: H5N1
Nature of diagnosis: Clinical, Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports: Immediate notification (17 May 2009); Follow-up
report No. 1 (04 Jun 2009)

New outbreaks
Outbreak 1 Nanhai Prefecture, Nanhai Prefecture, QINGHAI
Date of start of the outbreak 27 May 2009
Outbreak status: Continuing (or date resolved not provided)
Epidemiological unit: Not applicable

Species Birds
Susceptible 23 903
Cases 0
Deaths 0
Destroyed 23903
Slaughtered 0

Species Wild species
Susceptible
Cases
Deaths 162
Destroyed
Slaughtered
Affected population 23 093 domestic birds were destroyed as a
precaution to avoid avian influenza spread from wild birds to domestic birds.

Summary of outbreaks Total outbreaks: 1

Species Birds
Apparent morbidity rate 0.00 percent
Apparent mortality rate 0.00 percent
Apparent case fatality rate **
Proportion susceptible animals lost* 100.00 percent

Species Wild species
Apparent morbidity rate **
Apparent mortality rate **
Apparent case fatality rate **
Proportion susceptible animals lost* **
* Removed from the susceptible population through death, destruction
and/or slaughter
** Not calculated because of missing information

Epidemiology
Source of the outbreak(s) or origin of infection. Unknown or inconclusive

Diagnostic test results
Laboratory name and type Harbin Veterinary Research Institute (OIE's
Reference Laboratory)

Species Wild species
Test haemagglutination (HA) test
Test date 04 Jun 2009
Result Positive

Species Wild species
Test real-time PCR
Test date 04 Jun 2009
Result Positive

Species Wild species
Test virus isolation
Test date 04 Jun 2009
Result Positive

Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.