OIE: Highly pathogenic avian influenza, China (People´s Rep. of)

OIE: Highly pathogenic avian influenza, China (People´s Rep. of)
submited by kickingbird at Apr, 19, 2012 9:19 AM from OIE

Information received on 18/04/2012 from Dr Zhang Zhongqiu, Director General , China Animal Disease Control Centre, Veterinary Bureau, Ministry of Agriculture, Beijing, China (People´s Rep. of)

Summary

Report type	Follow-up report No. 2
Start date	02/12/2011
Date of first confirmation of the event	12/12/2011
Report date	18/04/2012
Date submitted to OIE	18/04/2012
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	25/05/2010
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 (12/12/2011) Follow-up report No. 1 (31/03/2012) Follow-up report No. 2 (18/04/2012)

New outbreaks

Outbreak 1

Yanglang village, Yuanzhou district, Guyuan, NINGXIA

Date of start of the outbreak

13/04/2012

Outbreak status

Continuing (or date resolved not provided)

Epidemiological unit

Farm

Affected animals

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	95000	23880	10468	84532	0

Summary of outbreaks

Total outbreaks: 1

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	25.14%	11.02%	43.84%	100.00%

* Removed from the susceptible population through death, destruction and/or slaughter

Epidemiology

Source of the outbreak(s) or origin of infection

Unknown or inconclusive

Control measures

Measures applied	Stamping out Quarantine Movement control inside the country Zoning Disinfection of infected premises/establishment(s) Dipping / Spraying Vaccination prohibited No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type

Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences (national reference laboratory for avian influenza) (OIE’s Reference Laboratory)

Tests and results

Species	Test	Test date	Result
Birds	haemagglutination inhibition test (HIT)	18/04/2012	Positive
Birds	intravenous pathogenicity index (IVPI) test	18/04/2012	Positive
Birds	reverse transcription - polymerase chain reaction (RT-PCR)	18/04/2012	Positive

Future Reporting

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

See Also:

http://web.oie.int/wahis/public.php?page=single_report&pop=1&reportid=11869

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