Myanmar - 1 new outbreak of highly pathogenic avian influenza H5N6 in layer chicken in livestock market, Shan State, resolved 06-04-2016 (OIE, February 7, 2017)

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Highly pathogenic avian influenza, Myanmar

Information received on 07/02/2017 from Dr Ye Tun Win, Chief Veterinary Officer Director General, Livestock Breeding and Veterinary Department, Ministry of Livestock and Fisheries, Nay Pyi Taw, Myanmar

Summary Report type Immediate notification (Final report) Date of start of the event 15/03/2016 Date of confirmation of the event 14/12/2016 Report date 07/02/2017 Date submitted to OIE 07/02/2017 Date event resolved 06/04/2016 Reason for notification New strain of a listed disease Manifestation of disease Sub-clinical infection Causal agent Highly pathogenic avian influenza virus Serotype H5N6 Nature of diagnosis Laboratory (basic), Laboratory (advanced) This event pertains to a defined zone within the country

New outbreaks (1)

Outbreak 1 (SAN:16-03146) Monglar, Monglar, Kyaingtong, Shan State Date of start of the outbreak 15/03/2016 Outbreak status Resolved (06/04/2016) Epidemiological unit Livestock market Affected animals Species Susceptible Cases Deaths Destroyed Slaughtered Birds 300 5 0 300 Affected population Layer chicken from collecting points

Summary of outbreaks Total outbreaks: 1 Total animals affected Species Susceptible Cases Deaths Destroyed Slaughtered Birds 300 5 0 300 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds 1.67% ** ** ** *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 Introduction of new live animals Epidemiological comments Risk-based surveillance of H7N9 in targeted border Townships and live bird market in Yangon and Mandalay has been conducted since 2013 by cooperation between the Livestock Breeding and Veterinary Department and FAO. Until now, the 5th round of the risk based surveillance of H7N9 has been conducted and 16545 chickens and ducks oropharyngeal swabs, 7765 environmental swabs and 705 duck sera were collected from poultry collecting points, poultry processing sites, formal city markets and live bird markets. Those samples were tested in Mandalay and Yangon Diagnostic Laboratory and then confirmed and sequenced by the Australian Animal Health Laboratory, Geelong. From this 5th round of active surveillance, clade 2.3.4.4 H5N6 HPAI virus, which shares 99% similarity with A/chicken/Hubei/XG18/2015(H5N6) and 98% similarity with A/duck/Guangdong/GD01/2014(H5N6), was detected in the samples collected from chicken and environmental swabs in Monglar, which has a common border with China. H5N6 positive samples were taken from apparently healthy chickens imported from China, as well as from the environment. H5N6 positive samples were more concentrated geographically and temporally, and were found specifically in live bird markets, in ducks and chickens imported from China (unknown breeds).

Control measures Measures applied Movement control inside the country Disinfection / Disinfestation Dipping / Spraying for control of vectors or parasites Stamping out Surveillance within containment and/or protection zone Zoning Vaccination prohibited No treatment of affected animals Measures to be applied No other measures

Diagnostic test results Laboratory name and type Species Test Test date Result Australian Animal Health Laboratory, Geelong (OIE Reference Laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 14/12/2016 Positive

Future Reporting The event is resolved. No more reports will be submitted.

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http://www.oie.int/wahis_2/public/wa...reportid=22630