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Italy: H5N3 low pathogenicity in in an ostrich farm in the Mantua area

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  • Italy: H5N3 low pathogenicity in in an ostrich farm in the Mantua area

    Serological positivity for H5 flu virus in an ostrich farm in the province of Mantua. The samples had been taken as part of ordinary surveillance. There was no clinical symptomatology in ostrich breeding, about a hundred animals, which on June 16 had serological positivity for H5 flu virus. Confirmation came on June 16 from the National Reference Center for Avian Influenza, following tests for inhibiting haemagglutination.

    According to the Ministry of Health, the lack of clinical symptoms and the absence of cross-reactivity towards highly pathogenic antigens of the subtype H5, suggest that they are low pathogenic avian influenza (LPAI). Phylogenetic analysis is underway to establish the examination of the pathotype and neuraminidase.

  • #2
    Low pathogenic avian influenza (poultry),
    Information received on 23/06/2020 from Dr Silvio Borrello, Chief Veterinary Officer, Food Safety and Collegial Bodies for Health Protection, Ministère de la Santé, Department for Veterinary Public Health, Rome, Italy
    Report type Immediate notification
    Date of start of the event 15/06/2020
    Date of confirmation of the event 16/06/2020
    Report date 22/06/2020
    Date submitted to OIE 23/06/2020
    Reason for notification Recurrence of a listed disease
    Date of previous occurrence 24/04/2020
    Manifestation of disease Clinical disease
    Causal agent Low pathogenic avian influenza virus
    Serotype H5N3
    Nature of diagnosis Clinical, Laboratory (advanced)
    This event pertains to a defined zone within the country
    New outbreaks (1)
    Outbreak 1 (LPAI 1_2020_MN) Suzzara, MANTOVA, Lombardia
    Date of start of the outbreak 15/06/2020
    Outbreak status Continuing (or date resolved not provided)
    Epidemiological unit Farm
    Affected animals
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 132 5 0 132 0
    Affected population The positivity concerns an ostrich farm located in the municipality of Suzzara, in the Province of Mantova.
    Summary of outbreaks Total outbreaks: 1
    Total animals affected
    Species Susceptible Cases Deaths Killed and disposed of Slaughtered
    Birds 132 5 0 132 0
    Outbreak statistics
    Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
    Birds 3.79% 0.00% 0.00% 100.00%
    *Removed from the susceptible population through death, destruction and/or slaughter
    Source of the outbreak(s) or origin of infection
    • Unknown or inconclusive
    Control measures
    Measures applied
    • Surveillance within containment and/or protection zone
    • Traceability
    • Official disposal of carcasses, by-products and waste
    • Stamping out
    • Disinfection
    • Vaccination permitted (if a vaccine exists)
    • No treatment of affected animals
    Measures to be applied
    • No other measures
    Diagnostic test results
    Laboratory name and type Species Test Test date Result
    Experimental Zooprophylactic Institute (IZS), Venezie - Padova (National laboratory) Birds haemagglutination inhibition test (HIT) 16/06/2020 Positive
    Future Reporting
    The event is continuing. Weekly follow-up reports will be submitted.
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