China - 2 new outbreaks of highly pathogenic avian influenza H7N9 in birds in farms in Hebei and Tianjin (OIE, May 24, 2017)

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

Information received on 25/05/2017 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. 2 Date of start of the event 19/03/2017 Date of confirmation of the event 24/03/2017 Report date 24/05/2017 Date submitted to OIE 25/05/2017 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)

New outbreaks (2)

Outbreak 1 Xingtai, Xingtai, HEBEI Date of start of the outbreak 28/04/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 30000 8500 5000 25000 0 Affected population The outbreak was observed in local layer farm through active surveillance.

Outbreak 2 Tianjin, Wuqing District, TIANJIN Date of start of the outbreak 13/05/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 99150 10000 6000 93150 0 Affected population The outbreak was observed in local layer farm by local veterinary authority through active surveillance.

Summary of outbreaks Total outbreaks: 2 Total animals affected Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 129150 18500 11000 118150 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds 14.32% 8.52% 59.46% 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 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 Lab for Avian Influenza (OIE Reference Laboratory) Birds virus sequencing 24/05/2017 Positive

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

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