EI Outbreak in China - the statistics.

Equine influenza,
China (People's Rep. of)

Information received on 05/11/2007 from Mr Jia Youling, National Chief Veterinary Officer, Veterinary Bureau, Director General, BEIJING, China (People's Rep. of)

Report type:Immediate notification
Start date: 09/10/2007
Date of confirmation of event: 30/10/2007
Report date: 05/11/2007
Date submitted to OIE: 05/11/2007
Reason for notification: Reoccurrence of a listed disease
Date of previous occurrence: 1994
Manifestation of disease: Clinical disease
Causal agent: Equine influenza virus A subtype H3N8
Nature of diagnosis: Clinical, Laboratory (advanced)
Report pertains to: Entire country
Outbreak 1: Altay, XINJIANG
Date of start of outbreak: 09/10/2007
Outbreak status: Continuing (or date resolved not submitted)
Epidemiological unit: Village

Affected animals
Species: Equidae
Susceptible: 130000
Cases: 5515
Deaths: 0
Destroyed: 0
Slaughtered: 0

Summary of outbreaks
Total outbreaks: 1

Outbreak statistics
Species: Equidae
Apparent morbidity rate: 4.24%
Apparent mortality rate: 0.00%
Apparent case fatality rate: 0.00%
Proportion susceptible removed*: 0.00%
* Removed from the susceptible population either through death, destruction or slaughter

Epidemiology
Source of infection: Unknown or inconclusive:
Note by the OIE's Animal Health Information Department: Epidemiological comments. Information was not provided outbreak by outbreak. Figures indicate the total number of susceptible animals and cases in seven counties, namely Altay, Burqin, Fuhai, Fuyun, Habahe, Jemnay and Qinghe.

Control measures
Movement control inside the country
Screening
Disinfection of infected premises/establishment(s)
Dipping / Spraying
Measures already applied
Quarantine
Zoning
Vaccination permitted
Treatment of affected animals (-)
Measures to be applied
None specified
Diagnostic test results: n/a

Laboratory name and type: Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences (National laboratory)

Tests and results:

Species: Equidae
Test: haemagglutination inhibition test (HIT)
Test date: 30/10/2007
Result:Positive

Species: Equidae
Test: reverse transcription – polymerase chain reaction (RT-PCR)
Test date: 30/10/2007
Result:Positive

Species: Equidae
Test: virus isolation
Test date: 30/10/2007
Result:Positive

http://www.oie.int/wahid-prod/public.php?page=single_report&pop=1&reportid=6429

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