Highly pathogenic avian influenza, South Africa (OIE, November 14 2011, edited): Three New H5N2 Poultry Outbreaks

[Giuseppe]

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


Highly pathogenic avian influenza, South Africa


Information received on 14/11/2011 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. 8
  • Start date 01/02/2011
  • Date of first confirmation of the event 16/03/2011
  • Report date 14/11/2011
  • Date submitted to OIE 14/11/2011
  • 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)
    • Follow-up report No. 6 (26/08/2011)
    • Follow-up report No. 7 (22/09/2011)
    • Follow-up report No. 8 (14/11/2011)
• New outbreaks
  • Outbreak 1 (AI_ECP2011_01) AI_ECP2011_01, Ikwezi, EASTERN CAPE PROVINCE
    • Date of start of the outbreak 19/09/2011
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 400 ? 8 ? 0 ? 0 ? 0
  • Outbreak 2 (AI_WCP2011_41) AI_WCP2011_41, Oudtshoorn, WESTERN CAPE PROVINCE
    • Date of start of the outbreak 31/08/2011
    • Outbreak status Resolved (07/10/2011)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 414 ? 13 ? 0 ? 0 ? 414
      • Affected Population PCR positive
  • Outbreak 3 (AI_WCP2011_42) AI_WCP2011_42, Mossel Bay, WESTERN CAPE PROVINCE
    • Date of start of the outbreak 20/09/2011
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 946 ? 75 ? 0 ? 0 ? 0
• Summary of outbreaks
  • Total outbreaks: 3
  • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
    • Birds ? 1760 ? 96 ? 0 ? 0 ? 414
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - 5.45% - 0.00% - 0.00% - 23.52%
    • * 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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[kiwibird]

Re: Highly pathogenic avian influenza, South Africa (OIE, November 14 2011, edited): Three New H5N2 Poultry Outbreaks

Tuesday, November 15, 2011
Highly Pathogenic Avian Flu in South Africa

SOUTH AFRICA - The South African veterinary authorities have reported three outbreaks of highly pathogenic avian influenza (HPAI) in the Eastern Cape and Western Cape provinces.

snip .. it was discovered that the causal agent has been identified as H5N2 serotype.

The outbreaks took place in several commercial ostrich farms. A total of 1760 ostriches were found susceptible to the outbreaks, out of which 96 cases were identified. No deaths were recorded. However, 414 birds were slaughtered.

According to the OIE, the farms tested positive on serology during routine surveillance, but tested negative on PCR and no virus could be found. Diagnosis was 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......

Full Story: http://www.thepoultrysite.com/poultrynews/24038/highly-pathogenic-avian-flu-in-south-africa