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


Low pathogenic avian influenza (poultry) H7, South Africa


Information received on 30/08/2013 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 30/07/2013
    • Date of pre-confirmation of the event 01/08/2013
    • Report date 30/08/2013
    • Date submitted to OIE 30/08/2013
    • Reason for notification Reoccurrence of a listed disease
    • Date of previous occurrence 05/2012
    • Manifestation of disease Sub-clinical infection
    • Causal agent Low pathogenic avian influenza virus
    • Serotype H7
    • Nature of diagnosis Laboratory (advanced)
    • This event pertains to a defined zone within the country
  • New outbreaks (1)
    • Outbreak 1 (LPNAI_Gau2013_001) LPNAI_Gau2013_001, City of Tshwane, GAUTENG
      • Date of start of the outbreak 30/07/2013
      • Outbreak status Continuing (or date resolved not provided)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds - 2000 ? 4 ? 0 ? 0 ? 0
        • Affected population Captive cattle egrets, umbrella cockatoo and eagle owl
  • Summary of outbreaks
    • Total outbreaks: 1
      • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds ? 2000 ? 4 ? 0 ? 0 ? 0
      • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
        • Birds - 0.20% - 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
    • This outbreak is more than 1,000 km away from any other reported H7N1 or H7N7 outbreaks and occurred in species other than ostriches.
    • There is no evidence to link this outbreak to previous outbreaks.
    • This outbreak occurred in indigenous wild birds and an exotic parrot kept in captivity.
    • The birds were tested for planned export.
    • They tested positive on RT-PCR for H7.
    • The samples did not render enough material to allow sequencing or virus isolation and the N-type could not be determined.
    • It is highly unlikely that further information on the N-type will be obtained.
    • For this reason, the veterinary services decided to report it as a new event.
    • 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
      • Screening
      • No vaccination
      • 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 reverse transcriptase/polymerase chain reaction (RRT-PCR) - 01/08/2013 ? Positive
  • Future Reporting
    • The event is continuing. Weekly follow-up reports will be submitted.
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