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Highly pathogenic avian influenza, South Africa (WAHID Interface - OIE World Animal Health Information Database, April 12 2011, edited), H5N2, ostrich

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  • Highly pathogenic avian influenza, South Africa (WAHID Interface - OIE World Animal Health Information Database, April 12 2011, edited), H5N2, ostrich

    Highly pathogenic avian influenza, South Africa (WAHID Interface - OIE World Animal Health Information Database, April 12 2011, edited)


    [Source: OIE, full page: <cite cite="http://web.oie.int/wahis/public.php?page=single_report&pop=1&reportid=10477 ">WAHID Interface - OIE World Animal Health Information Database</cite>. Extract, edited.]

    Highly pathogenic avian influenza, South Africa

    Information received on 12/04/2011 from Dr Bothle Michael Modisane, Chief Director Partnerships, Department of Agriculture, Forestry and Fisheries, Food Safety and Biosecurity, PRETORIA, South Africa
    • Summary
      • Report type Immediate notification
      • Start date 01/02/2011
      • Date of first confirmation of the event 16/03/2011
      • Report date 11/04/2011
      • Date submitted to OIE 12/04/2011
      • Reason for notification Reoccurrence of a listed disease
      • Date of previous occurrence 07/2006
      • Manifestation of disease Clinical disease
      • Causal agent Highly pathogenic avian influenza virus
      • Serotype H5N2
      • Nature of diagnosis Laboratory (advanced)
      • This event pertains to the whole country

    • New outbreaks
      • Outbreak 1 - (AI_WCP2011_01) AI_WCP2011_01, Oudtshoorn, WESTERN CAPE PROVINCE
        • Date of start of the outbreak 01/02/2011
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • Birds - 207 - ... - 0 - 0 - 0
          • Affected Population Commercial ostrich farm.
          • Outbreak picked up during routine surveillance.
          • No clinical signs seen.
      • Outbreak 2 - (AI_WCP2011_02) AI_WCP2011_02, Uniondale, WESTERN CAPE PROVINCE
        • Date of start of the outbreak 01/03/2011
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • Birds - 6523 - 0 - 0 - 0
          • Affected Population Commercial ostrich farm.
          • Outbreak picked up during routine surveillance.
          • No clinical signs seen.
      • Outbreak 3 - (AI_WCP2011_03) AI_WCP2011_03, Oudtshoorn, WESTERN CAPE PROVINCE
        • Date of start of the outbreak 20/02/2011
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • Birds - 5754 - 100 - 100 - 0 - 0
          • Affected Population Commercial ostrich farm.
          • Outbreak picked up during routine surveillance.
          • Mortalities and clinical signs started afterwards.
          • PCR positive for H5N2.
      • Outbreak 4 - (AI_WCP2011_04) AI_WCP2011_04, Oudtshoorn, WESTERN CAPE PROVINCE
        • Date of start of the outbreak 01/03/2011
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • Birds - 1610 - ... - 0 - 0 - 0
          • Affected Population Commercial ostrich farm.
          • Outbreak picked up during routine surveillance.
          • No clinical signs seen.
      • Outbreak 5 - (AI_WCP2011_05) AI_WCP2011_05, Uniondale, WESTERN CAPE PROVINCE
        • Date of start of the outbreak 01/03/2011
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
          • Birds - 819 - ... - 0 - 0 - 0
          • Affected Population Commercial ostrich farm.
          • Outbreak picked up during routine surveillance.
          • No clinical signs seen.

    • Summary of outbreaks
      • Total outbreaks: 5
      • Total animals affected: Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
        • Birds - 14913 - 100** - 100 - 0 - 0
      • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
        • Birds - ** - 0.67% - ** - 0.67%
        • * Removed from the susceptible population through death, destruction and/or slaughter
        • ** Not calculated because of missing information

    • Epidemiology
      • Source of the outbreak(s) or origin of infection
        • Unknown or inconclusive

    • Epidemiological comments
      • Commercial ostrich farms. Farms tested positive on serology during routine surveillance, but tested negative on PCR and no virus could be found.
      • Diagnosis only confirmed after several follow-up PCR tests.
      • South Africa only reports outbreaks on confirmation on PCR tests.
      • Initially no clinical signs or mortalities were seen.

    • Control measures
      • Measures applied
        • Quarantine
        • Screening
        • Vaccination prohibited
        • No treatment of affected animals
      • Measures to be applied
        • Stamping out

    • 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) - 16/03/2011 - Positive
          • Birds - real-time PCR - 09/04/2011 - Positive
          • Birds - real-time PCR - 12/04/2011 - Positive

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

    (...)
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