Taiwan - 1 new outbreak of low pathogenic avian influenza H7N7 in a duck farm in Yilan County (OIE, May 13, 2019)

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Low pathogenic avian influenza (poultry), Chinese Taipei

Information received on 13/05/2019 from Dr Wen-Jane Tu, Chief Veterinary Officer, Deputy Director General, Bureau of Animal and Plant Health Inspection and Quarantine, Council of Agriculture, Executive Yuan, Taipei, Chinese Taipei

Summary Report type Immediate notification (Final report) Date of start of the event 10/01/2019 Date of confirmation of the event 29/04/2019 Report date 13/05/2019 Date submitted to OIE 13/05/2019 Date event resolved 07/05/2019 Reason for notification New strain of a listed disease in the country Causal agent Low pathogenic avian influenza virus Serotype H7N7 Nature of diagnosis Laboratory (advanced) This event pertains to a defined zone within the country

New outbreaks (1)

Outbreak 1 (H7N7-LPAI-2019) Jiaoxi Township, Yilan County Date of start of the outbreak 10/01/2019 Outbreak status Resolved (07/05/2019) Epidemiological unit Farm Affected animals Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 1300 0 0 0 Affected population Breeding ducks(2019-yi-1)

Summary of outbreaks Total outbreaks: 1 Total animals affected Species Susceptible Cases Deaths Killed and disposed of Slaughtered Birds 1300 ** 0 0 0 Outbreak statistics Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Birds ** 0.00% ** 0.00% *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 This duck farm in Yilan County was sampled by the staff of the Local Animal Disease Inspection Authority (LADIA, formerly named as Local Disease Control Centre, LDCC) for active surveillance on 10 January 2019. H7N7 subtype of low pathogenic avian influenza (LPAI) was detected and confirmed by the National Laboratory, Animal Health Research Institute (AHRI), in the evening of 29 April 2019. Highly pathogenic avian influenza (HPAI) was excluded through an intravenous lethality test (inoculation test) that day. The LADIA implemented movement control on this duck farm and disinfected its neighbouring areas. The LADIA has completed the three-month intensified surveillance which includes clinical examination and sampling of the index farm and all poultry farms (eight chicken farms and 13 duck farms) within 3 km radius of the index farm. All poultry in those farms were clinically healthy and the test results were all negative. Chinese Taipei therefore declares that the event has been resolved.

Control measures Measures applied Movement control inside the country Surveillance outside containment and/or protection zone Surveillance within containment and/or protection zone Traceability Quarantine Control of wildlife reservoirs Disinfection 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 Animal Health Research Institute (AHRI) (National laboratory) Birds gene sequencing 21/01/2019 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds inoculation test 29/04/2019 Negative Animal Health Research Institute (AHRI) (National laboratory) Birds reverse transcription - polymerase chain reaction (RT-PCR) 21/01/2019 Positive Animal Health Research Institute (AHRI) (National laboratory) Birds virus isolation 28/01/2019 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=30402