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