China - 1 new outbreak of highly pathogenic avian influenza H7N9 in birds on farm, Yulin City, Yuyang District, Shaanxi (OIE, June 1, 2017)

[Pathfinder]

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

Information received on 02/06/2017 from Dr Zhang Zhongqui, 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. 3 Date of start of the event 19/03/2017 Date of confirmation of the event 24/03/2017 Report date 01/06/2017 Date submitted to OIE 02/06/2017 Reason for notification New strain of a listed disease Manifestation of disease Clinical disease Causal agent Highly pathogenic avian influenza virus Serotype H7N9 Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced) This event pertains to a defined zone within the country Related reports Immediate notification (24/03/2017) Follow-up report No. 1 (12/05/2017) Follow-up report No. 2 (24/05/2017) Follow-up report No. 3 (01/06/2017)

New outbreaks (1)

Outbreak 1 Yulin City, Yuyang District, SHAANXI Date of start of the outbreak 23/05/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 45000 31700 22000 23000 Affected population The outbreak was observed in local layer farm by active surveillance.

Summary of outbreaks Total outbreaks: 1 Total animals affected Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 45000 31700 22000 23000 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds 70.44% 48.89% 69.40% ** *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

Control measures Measures applied Movement control inside the country Screening Quarantine Official disposal of carcasses, by-products and waste Stamping out Disinfection Vaccination permitted (if a vaccine exists) No treatment of affected animals Measures to be applied No other measures

Diagnostic test results Laboratory name and type Species Test Test date Result Harbin National Reference Laboratory for Avian Influenza (OIE Reference Laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 31/05/2017 Positive Harbin National Reference Laboratory for Avian Influenza (OIE Reference Laboratory) Birds virus sequencing 01/06/2017 Positive

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

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http://www.oie.int/wahis_2/public/wahid.php/Reviewreport/Review?page_refer=MapFullEventReport&reportid=23926

[Miyamoto Masakazu]

After Hebei province, Henan province and Tianjin city, this is the Fourth Outbreak among birds:

Please note that the Yuyang district of Yulin city reported the city's first human H7N9 case recently though they says the inner Mongolian case got sick outside the province. I am very much interested in this incidence. Is there any contact with the Mongolian case or not?: LOL

China: H7N9 Outbreak in Yuyang District of Yulin City in Shaanxi Province

On May 23, Veterinary Department of Yuyang district in Yulin city, Shaanxi province, during their monitoring, found suspicious bird flu symptoms in some chicken-breeding-farms. 22,000 chickens got ill, and died in this incidence.
On May 26, Shaanxi provincial Center for Animal Disease Prevention and Control diagnosed it suspicious avian flu outbreak.
May 31, 2017, after National Avian Influenza Reference Laboratory?s confirmation, this was diagnosed as the outbreak of H7N9 avian flu.
After this, the local authorities in accordance with the requirements on the relevant prevention/control plans and technical requirements, developed law-based prevention/control, scientific prevention/control effectively. They have already culled 23,000 chickens and made them harmless.
At present, the avian flu is effectively controlled.

Source(Ministry of Agriculture):

http://www.syj.moa.gov.cn/dwyqdt/jczt/201706/t20170601_5651411.htm

<<Machine T.>>
China: Yushu City, Shaanxi Province, Yuyang District, a poultry H7N9 flu outbreak


May 23, Yulin City, Shaanxi Province, Yuyang District, veterinary departments in the monitoring found a farm breeding chickens suspected bird flu symptoms, the incidence of 22,000 deaths. May 26, Shaanxi Province, animal disease prevention and control center diagnosed as suspected avian influenza epidemic. May 31, by the National Avian Influenza reference laboratory confirmed the outbreak for the H7N9 flu epidemic. After the epidemic, the local according to the relevant plans and control technical requirements, adhere to the law prevention and control, scientific prevention and control, and effectively do the epidemic disposal work, has been culling and harmless treatment of 23,000 poultry. At present, the epidemic has been effectively controlled.