Low pathogenic avian influenza (poultry) H7N1, South Africa (OIE, December 25 2013): 3 New Outbreaks

[Giuseppe]

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


Low pathogenic avian influenza (poultry) H7N1, South Africa


Information received on 24/12/2013 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 20/10/2013
  • Date of pre-confirmation of the event 04/11/2013
  • Report date 24/12/2013
  • Date submitted to OIE 24/12/2013
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 24/04/2013
  • Manifestation of disease Sub-clinical infection
  • Causal agent Low pathogenic avian influenza virus
  • Serotype H7N1
  • Nature of diagnosis Laboratory (advanced)
  • This event pertains to the whole country
  
  
• New outbreaks (3)
  • Outbreak 1 (LPAI_2013H7N1_002) LPAI_2013H7N1_002, Blue Crane Route, EASTERN CAPE PROVINCE
    • Date of start of the outbreak 20/10/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 988 ? 13 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
    
    
  • Outbreak 2 (LPAI_2013H7N1_001) LPAI_2013H7N1_001, Blue Crane Route, EASTERN CAPE PROVINCE
    • Date of start of the outbreak 20/10/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 675 ? 23 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
    
    
  • Outbreak 3 (LPAI_2013H7N1_003) LPAI_2013H7N1_003, Blue Crane Route, EASTERN CAPE PROVINCE
    • Date of start of the outbreak 20/11/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 1243 ? 28 ? 0 ? 0 ? 0
      • Affected population Commercial ostriches
  
  
• Summary of outbreaks
  • Total outbreaks: 3
    • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 2906 ? 64 ? 0 ? 0 ? 0
      
      
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Birds - 2.20% - 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
  • LPAI positive serology detected on pre-slaughter/pre-movement routine testing.
  • 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 (2013).
  
  
• Control measures
  • Measures applied
    • Quarantine
    • Movement control inside the country
    • Screening
    • Disinfection of infected premises/establishment(s)
    • Modified stamping out
    • Vaccination prohibited
    • No treatment of affected animals
    
    
  • Measures to be applied
    • No other measures
  
  
• Diagnostic test results
  • Laboratory name and type ? Species ? Test - Test date ? Result
    • Deltamune (Private Laboratory) ? Birds - antibody detection ELISA - 04/11/2013 ? Positive
    • Deltamune (Private Laboratory) ? Birds - haemagglutination inhibition test (HIT) - 04/11/2013 ? Positive
    • Deltamune (Private Laboratory) ? Birds - polymerase chain reaction (PCR) - 10/11/2013 ? Negative
  
  
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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