China - 6 new outbreaks of highly pathogenic avian influenza H7N9 in livestock markets, Guangdong (OIE, March 1, 2017)

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

Information received on 01/03/2017 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. 1 Date of start of the event 10/01/2017 Date of confirmation of the event 18/02/2017 Report date 01/03/2017 Date submitted to OIE 01/03/2017 Reason for notification Reoccurrence of a listed disease Date of previous occurrence 2015 Manifestation of disease Sub-clinical infection Causal agent Highly pathogenic avian influenza virus Serotype H7N9 Nature of diagnosis Laboratory (basic), Laboratory (advanced) This event pertains to a defined zone within the country Related reports Immediate notification (18/02/2017) Follow-up report No. 1 (01/03/2017)

New outbreaks (6)

Outbreak 1 Zhongshan city, GUANGDONG Date of start of the outbreak 10/01/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Livestock market Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds Affected population One chicken swab sample in a live bird market

Outbreak 2 Huizhou city, GUANGDONG Date of start of the outbreak 10/01/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Livestock market Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds Affected population One chicken swab sample in a live bird market

Outbreak 3 Zhongshan city, GUANGDONG Date of start of the outbreak 28/02/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Livestock market Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds Affected population Three chicken swab samples and one environment sample in a live bird market

Outbreak 4 Dongguan city, GUANGDONG Date of start of the outbreak 28/02/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Livestock market Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds Affected population One environment sample in a live bird market

Outbreak 5 Shanwei city, GUANGDONG Date of start of the outbreak 28/02/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Livestock market Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds Affected population Three chicken swab samples and three environment samples in a live bird market

Outbreak 6 Meizhou city, GUANGDONG Date of start of the outbreak 28/02/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Livestock market Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds Affected population Six chicken swab samples and one environment sample in a live bird market

Summary of outbreaks Total outbreaks: 6 Total animals affected Species Susceptible Cases Deaths Destroyed Slaughtered Birds ** Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds ** ** ** ** *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 Epidemiological comments All relevant live poultry markets were entirely closed, cleaned and disinfected and surveillance strengthened. Up to date, during tracing back to the farms of origin, no unusual situation was observed in local poultry farms.

Control measures Measures applied Movement control inside the country Screening Disinfection / Disinfestation Quarantine 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 (National laboratory) Birds virus sequencing 28/02/2017 Positive

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

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