Vietnam - 1 new outbreak of highly pathogenic avian influenza H5N1 in backyard birds, Nghe An Province (OIE, November 27, 2015)

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Highly pathogenic avian influenza, Vietnam

Information received on 27/11/2015 from Dr Dong Pham Van, Director General, Chief Veterinary Officer, Department of Animal Health, Ministry of Agriculture and Rural Development, Hano?, Vietnam

Summary Report type Follow-up report No. 2 Date of start of the event 07/11/2015 Date of confirmation of the event 12/11/2015 Report date 27/11/2015 Date submitted to OIE 27/11/2015 Reason for notification Reoccurrence of a listed disease Date of previous occurrence 27/10/2015 Manifestation of disease Clinical disease Causal agent Highly pathogenic avian influenza virus Serotype H5N1 Nature of diagnosis Clinical, Laboratory (advanced) This event pertains to a defined zone within the country Related reports Immediate notification (17/11/2015) Follow-up report No. 1 (25/11/2015) Follow-up report No. 2 (27/11/2015)

New outbreaks (1)

Outbreak 1 Hoa Thanh, Hoa Thanh, Yen Thanh, NGHE AN Date of start of the outbreak 15/11/2015 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Backyard Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 520 450 220 300 0

Summary of outbreaks Total outbreaks: 1 Total animals affected Species Susceptible Cases Deaths Destroyed Slaughtered Birds 520 450 220 300 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds 86.54% 42.31% 48.89% 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 Disinfection / Disinfestation Stamping out Surveillance within containment and/or protection zone No vaccination No treatment of affected animals Measures to be applied No other measures

Diagnostic test results Laboratory name and type Species Test Test date Result Regional Animal Health Office (RAHO 3) (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 17/11/2015 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=19195