Highly pathogenic avian influenza H7N7, Italy (OIE, August 21 2013): 1 New Poultry Outbreak

[Giuseppe]

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


Highly pathogenic avian influenza H7N7, Italy


Information received on 21/08/2013 from Prof. Dr Romano Marabelli, Chief Veterinary Officer, Department for Veterinary Public Health, Food Safety and Collegial Bodies for Health Protection, Ministry of Health, Rome, Italy

• Summary
  • Report type Follow-up report No. 1
  • Date of start of the event 10/08/2013
  • Date of pre-confirmation of the event 14/08/2013
  • Report date 21/08/2013
  • Date submitted to OIE 21/08/2013
  • Reason for notification New strain of a listed disease
  • Manifestation of disease Clinical disease
  • Causal agent Highly pathogenic avian influenza virus
  • Serotype H7N7
  • Nature of diagnosis Clinical, Laboratory (basic)
  • This event pertains to a defined zone within the country
  • Related reports
    • Immediate notification (15/08/2013)
    • Follow-up report No. 1 (21/08/2013)
• New outbreaks (1)
  • Outbreak 1 - Mordano, Bologna, EMILIA-ROMAGNA
    • Date of start of the outbreak 20/08/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds - 584900 ? 1 ? 0 ? 0 ? 0
      • Affected population:
        • On the basis of the monitoring activities implemented after the detection of the primary outbreak in Ostellato, Ferrara province, notified on last 15 August, a secondary outbreak has been confirmed in Mordano, Bologna province, affecting a commercial farm of layer hens belonging to the same company.
• Summary of outbreaks
  • Total outbreaks: 1
    • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
      • Birds ? 584900 ? 1 ? 0 ? 0 ? 0
    • Outbreak statistics: Species - Apparent morbidity rate ? Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Birds - 0.00% - 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
  • In the secondary outbreak HPAI subtype H7 has been detected at RT-PCR and no clinical signs have been identified.
  • Restriction zone has been established, depopulation will be carried out and epidemiological investigation is on-going.
  • The depopulation operation in the primary outbreak, in Ostellato, Ferrara province, will be completed today 21 August, followed by cleaning and disinfection.
  • The National Reference Laboratory in Padova confirmed that the virus isolated is an HPAI H7N7 showing an IVPI 3,0.
  • Genome sequencing as well as the epidemiological investigation are ongoing.
  • Preliminary information would suggest that a LPAI virus entered the farm (possibly via wild birds) where it mutated to a HPAI strain.
• Control measures
  • Measures applied
    • Quarantine
    • Movement control inside the country
    • Vaccination prohibited
    • No treatment of affected animals
  • Measures to be applied
    • Stamping out
    • Screening
    • Disinfection of infected premises/establishment(s)
• Diagnostic test results
  • Laboratory name and type ? Species ? Test - Test date ? Result
    • Experimental Zooprophylactic Institute (IZSVe), PADOVA (National laboratory) ? Birds - reverse transcription - polymerase chain reaction (RT-PCR) - 21/08/2013 ? Positive
    • Experimental Zooprophylactic Institute (IZSVe), PADOVA (National laboratory) ? Birds - virus isolation - 16/08/2013 ? Positive
    • Experimental Zooprophylactic Institute (IZSVe), PADOVA (National laboratory) ? Birds - virus sequencing - 16/08/2013 ? Positive
• Future Reporting
  • The event is continuing. Weekly follow-up reports will be submitted.

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