OIE: Pandemic Influenza A/H1N1, Chinese Taipei

Information received on 07/09/2010 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 (Final report)
Start date 02/09/2010
Date of first confirmation of the event 02/09/2010
Report date 06/09/2010
Date submitted to OIE 07/09/2010
Date event resolved 06/09/2010
Reason for notification Emerging disease
Morbidity 0.1 %
Mortality 0 %
Zoonotic impact No
Causal agent Pandemic Influenza A/H1N1 virus

New outbreaks

Summary of outbreaks Total outbreaks: 1
Location(s)
  • T´AI-TUNG (Guanshan township)
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Swine 4000 4 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Swine 0.10% 0.00% 0.00% 0.00%

* Removed from the susceptible population through death, destruction and/or slaughter

Epidemiology

Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments The farmer reported pigs with signs of parakeratosis to the prefecture animal disease control competent authority, a zinc deficiency was suspected. Samples were collected and sent to the Animal Health Research Institute for diagnosis. Samples were also subjected to swine influenza virus test including pandemic influenza A/H1N1 virus test under the routine active and passive surveillance programme. Positive results in virus isolation, RRT-PCR and gene sequencing were obtained on 2 September 2010, which demonstrated that pigs were infected with pandemic influenza A/H1N1 virus.
Movement control was implemented and disinfection and cleaning of the index farm have been conducted and completed. Follow-up tests were conducted and negative results in RRT-PCR and virus isolation were obtained on 6 September 2010.
Six pig farms within 3km radius around the index farm have been investigated and monitored. No clinical evidence of infection was found.

Control measures

Measures applied
  • Movement control inside the country
  • Disinfection of infected premises/establishment(s)
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • No other measures

Diagnostic test results

Laboratory name and type Animal Health Research Institute (National laboratory)
Tests and results
Species Test Test date Result
Swine real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 02/09/2010 Positive
Swine real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 06/09/2010 Negative
Swine virus isolation 02/09/2010 Positive
Swine virus isolation 06/09/2010 Negative
Swine virus sequencing 02/09/2010 Positive

Future Reporting

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