Low pathogenic avian influenza (poultry) H7N7, South Africa (OIE, July 25 2013): 6 New Outbreaks

[Giuseppe]

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


Low pathogenic avian influenza (poultry) H7N7, South Africa


Information received on 25/07/2013 from Dr Bothle Michael Modisane, Chief Director , Department of Agriculture, Forestry and Fisheries, Animal Production and Health, PRETORIA, South Africa

• Summary
  • Report type Follow-up report No. 1
  • Date of start of the event 28/02/2013
  • Date of pre-confirmation of the event 29/06/2013
  • Report date 25/07/2013
  • Date submitted to OIE 25/07/2013
  • 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
  • Related reports
    • Immediate notification (04/07/2013)
    • Follow-up report No. 1 (25/07/2013)
• New outbreaks (6)
  • Outbreak 1 (LPAI_2013H7N7_008) LPAI_2013H7N7_008, Kopanong, FREE STATE
    • Date of start of the outbreak 01/05/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 224 ? 1 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
  • Outbreak 2 (LPAI_2013H7N7_009) LPAI_2013H7N7_009, Kopanong, FREE STATE
    • Date of start of the outbreak 01/05/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 186 ? 1 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
  • Outbreak 3 (LPAI_2013H7N7_004) LPAI_2013H7N7_004, Oudtshoorn, WESTERN CAPE PROVINCE
    • Date of start of the outbreak 07/05/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 3907 ? 2344 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
  • Outbreak 4 (LPAI_2013H7N7_006) LPAI_2013H7N7_006, George, WESTERN CAPE PROVINCE
    • Date of start of the outbreak 21/05/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 2723 ? 321 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
  • Outbreak 5 (LPAI_2013H7N7_005) LPAI_2013H7N7_005, Oudtshoorn, WESTERN CAPE PROVINCE
    • Date of start of the outbreak 21/05/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 550 ? 138 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
  • Outbreak 6 (LPAI_2013H7N7_007) LPAI_2013H7N7_007, Oudtshoorn, WESTERN CAPE PROVINCE
    • Date of start of the outbreak 31/05/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 1784 ? 595 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
• Summary of outbreaks
  • Total outbreaks: 6
  • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
    • Birds ? 9374 ? 3400 ? 0 ? 0 ? 0
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - 36.27% - 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
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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