Low pathogenic avian influenza (poultry) H7N7, South Africa (OIE, July 4 2013): 3 New Outbreaks

[Giuseppe]

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


Low pathogenic avian influenza (poultry) H7N7, South Africa


Information received on 04/07/2013 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
  • Date of start of the event 28/02/2013
  • Date of pre-confirmation of the event 29/06/2013
  • Report date 04/07/2013
  • Date submitted to OIE 04/07/2013
  • Reason for notification New strain of a listed disease
  • Manifestation of disease Sub-clinical infection
  • Causal agent Low pathogenic avian influenza virus
  • Serotype H7N7
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to the whole country
• New outbreaks (3)
  • Outbreak 1 (LPAI_2013H7N7_001) LPAI_2013H7N7_001, Oudtshoorn, WESTERN CAPE PROVINCE
    • Date of start of the outbreak 28/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 2815 ? 395 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
  • Outbreak 2 (LPAI_2013H7N7_002) LPAI_2013H7N7_002, Oudtshoorn, WESTERN CAPE PROVINCE
    • Date of start of the outbreak 15/03/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 3719 ? 1674 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
  • Outbreak 3 (LPAI_2013H7N7_003) LPAI_2013H7N7_003, George, WESTERN CAPE PROVINCE
    • Date of start of the outbreak 11/04/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 3113 ? 943 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
• Summary of outbreaks
  • Total outbreaks: 3
    • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 9647 ? 3012 ? 0 ? 0 ? 0
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Birds - 31.22% - 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 outbreaks LPAI_2013H7N7_001 and LPAI_2013H7N7_002 were first notified on 15 April 2013 as part of the on-going H7N1 event since at that time the neuraminidase was suspected as N1.
  • These outbreaks have been confirmed later as H7N7.
  • Note by the OIE Animal Health Information Department: H5 and H7 avian influenza in its low pathogenic form in poultry is a notifiable disease as per Chapter 10.4. on avian influenza of the Terrestrial Animal Health Code (2012).
• 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 ? Species ? Test - Test date ? Result
    • Agricultural Research Council - Onderstepoort Veterinary Institute (ARC ? OVI) (National laboratory) ? Birds - real-time PCR - 29/06/2013 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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