A/H1N1 influenza, Chinese Taipei (WAHID Interface - OIE World Animal Health Information Database, 11/5/09, edited)

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A/H1N1 influenza, Chinese Taipei (WAHID Interface - OIE World Animal Health Information Database, 11/5/09, edited)

A/H1N1 influenza, Chinese Taipei

Information received on 05/11/2009 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 19/10/2009
  • Date of first confirmation of the event 02/11/2009
  • Report date 05/11/2009
  • Date submitted to OIE 05/11/2009
  • Reason for notification Emerging disease
  • Morbidity 4.8 %
  • Mortality 0 %
  • Zoonotic impact No
  • Causal agent A/H1N1 influenza virus
  • Serotype Not typed
  • This event pertains to a defined zone within the country

• New outbreaks
  • Outbreak 1 - Guanshan township, T'AI-TUNG
    • Date of start of the outbreak 19/10/2009
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
      • Swine - 3346 - 160 - 0 - 0 - 0
      • Affected Population 5-week-old piglets

• Summary of outbreaks
  • Total outbreaks: 1
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Swine - 4.78% - 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
  • A/H1N1 influenza virus surveillance programme began since January 2009 in the country. Clinical signs such as coughing and diarrhoea were observed in a pig farm located in T?ai-Tung County on 19 October 2009. The owner reported it to the prefecture animal disease control competent authority. Official veterinarian inspected this farm right away. Samples were collected and sent to the Animal Health Research Institute.
  • Disinfection and cleaning of the index farm has been conducted and completed. Movement control has been also implemented. The positive results of virus isolation, real-time RT-PCR and gene sequencing demonstrated that this outbreak was caused by H1N1 influenza A virus.
  • The sick pigs in the index farm have recovered. One pig farm within 1km radius of the index farm has been under vigilant monitoring and no clinical or epidemiological evidence of infection has been found. Seven pig farms within 3km radius of the index farm have also been under intensive monitoring.

• 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 - gene sequencing - 04/11/2009 - Positive
      • Swine - real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) - 03/11/2009 - Positive
      • Swine - virus isolation - 02/11/2009 - Positive

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

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<cite cite="http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=8616">WAHID Interface - OIE World Animal Health Information Database</cite>