Highly pathogenic avian influenza, South Africa (OIE, February 1 2012): 1 New A(H7N1) Poultry Outbreak

[Giuseppe]

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


Highly pathogenic avian influenza, South Africa


Information received on 01/02/2012 from Dr Bothle Michael Modisane, Chief Director , Department of Agriculture, Forestry and Fisheries, Animal Production and Health, PRETORIA, South Africa

• Summary
  • Report type Immediate notification
  • Start date 19/12/2011
  • Date of first confirmation of the event 09/01/2012
  • Report date 01/02/2012
  • Date submitted to OIE 01/02/2012
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 21/10/2011
  • Manifestation of disease Sub-clinical infection
  • Causal agent Highly pathogenic avian influenza virus
  • Serotype H7N1
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to the whole country
• New outbreaks
  • Outbreak 1 (HPAI_H7_001) HPAI_H7_001, Hessequa, WESTERN CAPE PROVINCE
    • Date of start of the outbreak 19/12/2011
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 12278 ? 1028 ? 0 ? 0 ? 0
      • Affected Population
        • Commercial ostriches found to be seropositive for H7N1 during routine surveillance for HPAI.
• Summary of outbreaks
  • Total outbreaks: 1
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - 8.37% - 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
  • Commercial ostriches found to be seropositive for H7N1 during routine surveillance for HPAI.
• Control measures
  • Measures applied
    • Quarantine
    • Movement control inside the country
    • Screening
    • Vaccination prohibited
    • No treatment of affected animals
  • Measures to be applied
    • No other measures
• Diagnostic test results
  • Laboratory name and type Agricultural Research Council - Onderstepoort Veterinary Institute (ARC ? OVI) (National laboratory)
    • Tests and results: Species ? Test - Test date ? Result
      • Birds - haemagglutination inhibition test (HIT) - 31/01/2012 ? Positive
  • Laboratory name and type Deltamune (Private Laboratory)
    • Tests and results: Species ? Test - Test date ? Result
      • Birds - haemagglutination inhibition test (HIT) - 09/01/2012 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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