OIE: Highly pathogenic avian influenza, Chinese Taipei
Information received on 03/03/2012 from Dr Kwo-Ching Huang, Chief Veterinary Officer and 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 |
| Start date |
07/02/2012 |
| Date of first confirmation of the event |
13/02/2012 |
| Report date |
03/03/2012 |
| Date submitted to OIE |
03/03/2012 |
| Reason for notification |
First occurrence of a listed disease |
| Manifestation of disease |
Clinical disease |
| Causal agent |
Highly pathogenic avian influenza virus |
| Serotype |
H5N2 |
| Nature of diagnosis |
Laboratory (advanced) |
| This event pertains to |
the whole country |
New outbreaks
| Outbreak 1 |
Liou-Jia District, T´AI-NAN |
| Date of start of the outbreak |
07/02/2012 |
| Outbreak status |
Continuing (or date resolved not provided) |
| Epidemiological unit |
Farm |
| Affected animals |
| Species |
Susceptible |
Cases |
Deaths |
Destroyed |
Slaughtered |
| Birds |
4840 |
804 |
804 |
4036 |
0 | |
| Affected Population |
Broiler breeder |
| Summary of outbreaks |
Total outbreaks: 1 |
| Outbreak statistics |
| Species |
Apparent morbidity rate |
Apparent mortality rate |
Apparent case fatality rate |
Proportion susceptible animals lost* |
| Birds |
16.61% |
16.61% |
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 |
|
| Epidemiological comments |
Clinical cases were notified from the abattoir. The local disease control center (LDCC) traced back to the original broiler breeder farm. Movement restrictions and clinical and epidemiological investigation have been implemented. The mortality rate was about 16.6%. All the chickens on the farm were destroyed by LDCC as a precautionary measure on 10 February 2012. The results of RT-PCR test, HA0 cleavage site sequencing and pathogenicity test were obtained on 13 February 2012 and 20 February 2012, respectively. The results confirmed that the virus is classified as H5N2 HPAI virus. Clinical and epidemiological investigations were implemented on the surrounding poultry farms of the infected farm. No clinical suspected case or evidence of infection was detected. |
Control measures
| Measures applied |
- Stamping out
- Quarantine
- Movement control inside the country
- Screening
- Zoning
- Disinfection of infected premises/establishment(s)
- Vaccination prohibited
- No treatment of affected animals
|
| Measures to be applied |
|
Diagnostic test results
| Laboratory name and type |
Animal Health Research Institute (National laboratory) |
| Tests and results |
| Species |
Test |
Test date |
Result |
| Birds |
gene sequencing |
13/02/2012 |
Positive |
| Birds |
haemagglutination inhibition test (HIT) |
13/02/2012 |
Positive |
| Birds |
intravenous pathogenicity index (IVPI) test |
20/02/2012 |
Positive |
| Birds |
reverse transcription - polymerase chain reaction (RT-PCR) |
13/02/2012 |
Positive |
| Birds |
virus isolation |
20/02/2012 |
Positive | |
Future Reporting
| The event is continuing. Weekly follow-up reports will be submitted. |