Vietnam - 2 new outbreaks of highly pathogenic avian influenza H5N1 in backyard birds, Vinh Long, Quang Ninh (OIE, April 14, 2017)

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Highly pathogenic avian influenza, Vietnam

Information received on 14/04/2017 from Dr Dong Pham Van, Director General, Chief Veterinary Officer, Department of Animal Health, Ministry of Agriculture and Rural Development, Hanoď, Vietnam

Summary Report type Follow-up report No. 9 Date of start of the event 14/02/2017 Date of confirmation of the event 15/02/2017 Report date 14/04/2017 Date submitted to OIE 14/04/2017 Reason for notification Recurrence of a listed disease Date of previous occurrence 10/2016 Manifestation of disease Clinical disease Causal agent Highly pathogenic avian influenza virus Serotype H5N1 Nature of diagnosis Clinical, Laboratory (advanced) This event pertains to the whole country Related reports Immediate notification (19/02/2017) Follow-up report No. 1 (21/02/2017) Follow-up report No. 2 (23/02/2017) Follow-up report No. 3 (09/03/2017) Follow-up report No. 4 (12/03/2017) Follow-up report No. 5 (22/03/2017) Follow-up report No. 6 (25/03/2017) Follow-up report No. 7 (28/03/2017) Follow-up report No. 8 (07/04/2017) Follow-up report No. 9 (14/04/2017)

New outbreaks (2)

Outbreak 1 Khom 4, Thanh Phuoc, Binh Minh, VINH LONG Date of start of the outbreak 08/04/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Backyard Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 3000 350 350 2650 0

Outbreak 2 Khu 2, Hai Yen, Mong Cai, QUANG NINH Date of start of the outbreak 12/04/2017 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Backyard Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 670 320 320 350 0

Summary of outbreaks Total outbreaks: 2 Total animals affected Species Susceptible Cases Deaths Destroyed Slaughtered Birds 3670 670 670 3000 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds 18.26% 18.26% 100.00% 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 Vaccination in response to the outbreak (s) Disinfection / Disinfestation Stamping out Surveillance within containment and/or protection zone No treatment of affected animals Measures to be applied No other measures

Diagnostic test results Laboratory name and type Species Test Test date Result RAHO2 (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 13/04/2017 Positive

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

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