Bhutan - 1 new outbreak of highly pathogenic avian influenza H5N1 in birds in farm, Samtse district (OIE, March 23, 2018)

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Highly pathogenic avian influenza, Bhutan

Information received on 23/03/2018 from Dr Tashi Samdup, Director General, Department of Livestock, Ministry of Agriculture and Forests, Thimphu, Bhutan

Summary Report type Follow-up report No. 1 Date of start of the event 06/03/2018 Date of confirmation of the event 11/03/2018 Report date 23/03/2018 Date submitted to OIE 23/03/2018 Reason for notification Recurrence of a listed disease Date of previous occurrence 16/10/2016 Manifestation of disease Clinical disease Causal agent Highly pathogenic avian influenza virus Serotype H5N1 Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced), Necropsy This event pertains to a defined zone within the country Related reports Immediate notification (13/03/2018) Follow-up report No. 1 (23/03/2018)

New outbreaks (1)

Outbreak 1 Kalapani, Kalapani, Phuntshopelri, Samtse Date of start of the outbreak 16/03/2018 Outbreak status Continuing (or date resolved not provided) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 617 323 323 294 0 Affected population The affected population consisted of improved and local birds reared together in a farm at Kalapani village which is located close to the Indo-Bhutan border in Samtse district.

Summary of outbreaks Total outbreaks: 1 Total animals affected Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 617 323 323 294 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds 52.35% 52.35% 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 Illegal movement of animals Epidemiological comments The source of the outbreak is not known. Detailed epidemiological investigation is underway.

Control measures Measures applied Movement control inside the country Surveillance outside containment and/or protection zone Surveillance within containment and/or protection zone Official destruction of animal products Official disposal of carcasses, by-products and waste Stamping out Disinfection Ante and post-mortem inspections Vaccination prohibited No treatment of affected animals Measures to be applied Quarantine

Diagnostic test results Laboratory name and type Species Test Test date Result National Centre for Animal Health (National laboratory) Birds real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 19/03/2018 Positive

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

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