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Highly pathogenic avian influenza, South Africa (OIE, August 5 2011): 9 New H5N2 Poultry Outbreaks

Giuseppe

Giuseppe

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

Highly pathogenic avian influenza, South Africa


Information received on 05/08/2011 from Dr Bothle Michael Modisane, Chief Director , Department of Agriculture, Forestry and Fisheries, Animal Production and Health, PRETORIA, South Africa
  • Summary
    • Report type Follow-up report No. 5
    • Start date 01/02/2011
    • Date of first confirmation of the event 16/03/2011
    • Report date 05/08/2011
    • Date submitted to OIE 05/08/2011
    • 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
    • Related reports
      • Immediate notification (11/04/2011)
      • Follow-up report No. 1 (06/05/2011)
      • Follow-up report No. 2 (16/05/2011)
      • Follow-up report No. 3 (10/06/2011)
      • Follow-up report No. 4 (04/07/2011)
      • Follow-up report No. 5 (05/08/2011)
  • New outbreaks
    • Outbreak 1 (AI_WCP2011_32) AI_WCP2011_32, Uniondale, WESTERN CAPE PROVINCE
      • Date of start of the outbreak 15/06/2011
      • Outbreak status Continuing (or date resolved not provided)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds ? 870 ? 225 ? 0 ? 0 ? 0
        • Affected Population HI positive for H5 and H6
    • Outbreak 2 (AI_WCP2011_28) AI_WCP2011_28, Oudtshoorn, WESTERN CAPE PROVINCE
      • Date of start of the outbreak 02/06/2011
      • Outbreak status Resolved (04/07/2011)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds ? 134 ? 13 ? 0 ? 0 ? 134
        • Affected Population Commercial ostrich farm. Positive for H5 on PCR.
    • Outbreak 3 (AI_WCP2011_30) AI_WCP2011_30, Oudtshoorn, WESTERN CAPE PROVINCE
      • Date of start of the outbreak 06/07/2011
      • Outbreak status Continuing (or date resolved not provided)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds ? 879 ? 440 ? 0 ? 0 ? 0
        • Affected Population PCR positive for H5
    • Outbreak 4 (AI_WCP2011_33) AI_WCP2011_33, Oudtshoorn, WESTERN CAPE PROVINCE
      • Date of start of the outbreak 29/06/2011
      • Outbreak status Continuing (or date resolved not provided)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds ? 128 ? 34 ? 0 ? 0 ? 0
        • Affected Population HI positive for H5 & H6
    • Outbreak 5 (AI_WCP2011_34) AI_WCP2011_34, Oudtshoorn, WESTERN CAPE PROVINCE
      • Date of start of the outbreak 29/06/2011
      • Outbreak status Resolved (29/07/2011)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds ? 397 ? 66 ? 0 ? 14 ? 383
        • Affected Population PCR positive
    • Outbreak 6 (AI_WCP2011_27) AI_WCP2011_27, Oudtshoorn, WESTERN CAPE PROVINCE
      • Date of start of the outbreak 07/06/2011
      • Outbreak status Resolved (15/07/2011)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed - Slaughtered
        • Birds ? 669 ? 156 ? 0 ? 0 ? 669
        • Affected Population Commercial ostrich farm. Positive for H5 on PCR.
    • Outbreak 7 (AI_WCP2011_35) AI_WCP2011_35, Oudtshoorn, WESTERN CAPE PROVINCE
      • Date of start of the outbreak 29/06/2011
      • Outbreak status Continuing (or date resolved not provided)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds ? 638 ? 447 ? 0 ? 0 ? 0
        • Affected Population HI positive for H5 & H6
    • Outbreak 8 (AI_WCP2011_29) AI_WCP2011_29, Oudtshoorn, WESTERN CAPE PROVINCE
      • Date of start of the outbreak 01/07/2011
      • Outbreak status Continuing (or date resolved not provided)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds ? 97 ? 14 ? 0 ? 0 ? 0
        • Affected Population HI positive for H5 and H6
    • Outbreak 9 (AI_WCP2011_31) AI_WCP2011_31, Uniondale, WESTERN CAPE PROVINCE
      • Date of start of the outbreak 20/06/2011
      • Outbreak status Continuing (or date resolved not provided)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds ? 426 ? 311 ? 0 ? 0 ? 0
        • Affected Population PCR positive
  • Summary of outbreaks
    • Total outbreaks: 9
    • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 4238 ? 1706 ? 0 ? 14 ? 1186
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Birds - 40.25% - 0.00% - 0.00% - 28.32%
      • * 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 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.
    • Stamping out in positive farms is taking place.
  • Control measures
    • Measures applied
      • Stamping out
      • Quarantine
      • Screening
      • Vaccination prohibited
      • No treatment of affected animals
    • Measures to be applied
      • No other measures
  • Future Reporting
    • The event is continuing. Weekly follow-up reports will be submitted.
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