Pandemic Influenza A/H1N1, Chinese Taipei (OIE, 9/07/10, edited)

[Giuseppe]

Pandemic Influenza A/H1N1, Chinese Taipei (OIE, 9/07/10, edited)


[Source: OIE, full PDF Document (LINK). Edited.]

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.

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