Highly pathogenic avian influenza, Iran (OIE, October 13 2011): 2 New H5N1 Outbreaks in free-range ducks

[Giuseppe]

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

Highly pathogenic avian influenza, Iran


Information received on 13/10/2011 from Dr Seyed Mohsen Dastoor, Head of Iran Veterinary Organization, Iran Veterinary Organization , Ministry of Jihad-e-Agriculture, Tehran, Iran

• Summary
  • Report type Immediate notification
  • Start date 13/09/2011
  • Date of first confirmation of the event 15/09/2011
  • Report date 13/10/2011
  • Date submitted to OIE 13/10/2011
  • Reason for notification Reoccurrence of a listed disease
  • Date of previous occurrence 03/08/2008
  • Manifestation of disease Clinical disease
  • Causal agent Highly pathogenic avian influenza virus
  • Serotype H5N1
  • Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced)
  • This event pertains to a defined zone within the country
• New outbreaks
  • Outbreak 1 - BALAZARRIN KOLA, JOOYBAR, MAZANDARAN
    • Date of start of the outbreak 13/09/2011
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Village
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 2285 ? 450 ? 310 ? 1975 ? 0
      • Affected Population Free-range ducks (backyard)
  • Outbreak 2 - KHAJ KOLA, ZIRAB, SAVADKOOH, MAZANDARAN
    • Date of start of the outbreak 13/09/2011
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Village
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 397 ? 85 ? 35 ? 362 ? 0
      • Affected Population Free-range ducks (backyard)
• Summary of outbreaks
  • Total outbreaks: 2
  • Total animals affected: Species ? Susceptible ? Cases - Deaths ? Destroyed ? Slaughtered
    • Birds ? 2682 ? 535 ? 345 ? 2337 ? 0
  • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
    • Birds - 19.95% - 12.86% - 64.49% - 100.00%
    • * Removed from the susceptible population through death, destruction and/or slaughter
• Epidemiology
  • Source of the outbreak(s) or origin of infection
    • Under investigation
• Epidemiological comments
  • The event was reported according to the Iranian passive surveillance in place; a post-outbreak investigation to trace the source of infection is ongoing to detect the probable spread and circulation of H5 serotype.
  • Active surveillance is ongoing.
• Control measures
  • Measures applied
    • Control of wildlife reservoirs
    • Stamping out
    • Quarantine
    • Movement control inside the country
    • Screening
    • Zoning
    • Disinfection of infected premises/establishment(s)
    • Vaccination prohibited
    • No treatment of affected animals
  • Measures to be applied
    • No other measures
• Diagnostic test results
  • Laboratory name and type Central Veterinary Laboratory of Iran Veterinary Organization (National laboratory)
    • Tests and results: Species ? Test - Test date ? Result
      • Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 15/09/2011 ? Positive
  • Laboratory name and type Reference Laboratory for Avian Influenza, Padova (Italy) (OIE?s Reference Laboratory)
    • Tests and results: Species ? Test - Test date ? Result
      • Birds - real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) - 10/10/2011 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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