OIE:HIGHLY PATHOGENIC AVIAN INFLUENZA IN CHINA Follow-up report No. 4

OIE:HIGHLY PATHOGENIC AVIAN INFLUENZA IN CHINA Follow-up report No. 4
submited by kickingbird at Oct, 28, 2005 8:10 AM from OIE

Information received on 24 and 25 October 2005 from Mr Jia Youling, Director General, Veterinary Bureau, Ministry of Agriculture, Beijing:

End of previous report period: 19 October 2005 (see Disease Information, 18 [42], 367, dated 21 October 2005).

End of this report period: 25 October 2005.

Precise identification of agent: highly pathogenic avian influenza virus subtype H5.

Date of first confirmation of the event: 7 June 2005.

Nature of diagnosis: clinical, post-mortem and laboratory.

Details of new outbreaks:

*First administrative division*	*Lower administrative division*	*Type of epide-miolo-gical unit*	*Name of the location*	*Date of start of the outbreak*	*Spe-cies*	*Number of animals in the outbreaks*
*First administrative division*	*Lower administrative division*	*Type of epide-miolo-gical unit*	*Name of the location*	*Date of start of the outbreak*	*Spe-cies*	*susceptible*	*cases*	*deaths*	*destroyed*	*slaugh-tered*
AnHui province	Tianchang municipality	village	Liangying	20 Oct. 2005	avi	2,100	550	550	1,550	0
Hunan province	Xiangtan county	village	Wantang	22 Oct. 2005	avi	687	545	545	142	0

Description of affected population in the new outbreaks:

- Outbreak in Liangying, AnHui province: chickens and geese.

- Outbreak in Wantang, Hunan province: chickens and ducks.

Diagnosis:

Laboratory where diagnostic tests were performed

Diagnostic tests used

Date

Results

Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin (national reference laboratory for avian influenza)

- haemagglutination inhibition test;

- RT-PCR⁽¹⁾.

24 and 25 Oct. 2005

positive

intravenous pathogenicity index (IVPI) test

24 and 25 Oct. 2005

positive (highly pathogenic)

Source of new outbreaks: unknown or inconclusive.

Control measures undertaken:

- stamping out applied to the entire affected poultry flocks; in addition, killing and destruction of 43,186 birds in the area around the outbreak in Liangying, AnHui province, and of 2,345 birds in the area around the outbreak in Wantang, Hunan province;

- quarantine;

- movement control inside the country;

- screening;

- zoning;

- vaccination;

- disinfection of infected premises/establishments;

- dipping/spraying.

Vaccination in response to the outbreaks:

*First administrative division*	*Total number of birds vaccinated*	*Details of the vaccine*
AnHui province	140,000	monovalent inactivated vaccine against subtype H5N2
Hunan province	43,750	monovalent inactivated vaccine against subtype H5N2

Final report: no.

(1) RT-PCR: reverse transcriptase - polymerase chain reaction

See Also:

http://www.oie.int/eng/info/hebdo/AIS_47.HTM#Sec11

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