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Mexico - 2 new outbreaks of highly pathogenic avian influenza H7N3 in backyard birds (OIE, April 08, 2015)

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  • Mexico - 2 new outbreaks of highly pathogenic avian influenza H7N3 in backyard birds (OIE, April 08, 2015)

    Highly pathogenic avian influenza,
    Mexico
    Information received on 09/04/2015 from Dr Joaquín Braulio Delgadillo Álvarez, Director General de Salud Animal, Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria (SENASICA) Secretaría de Agricultura, Ganadería, Desarrollo Rural, Pesca y Alimentación, Ministerio de Agricultura, Ganadería, Desarrollo rural, Pesca y Alimentación, Mexico, Mexico
    Summary
    Report type Immediate notification
    Date of start of the event 09/03/2015
    Date of confirmation of the event 09/03/2015
    Report date 08/04/2015
    Date submitted to OIE 09/04/2015
    Reason for notification Reoccurrence of a listed disease
    Date of previous occurrence 09/2014
    Manifestation of disease Clinical disease
    Causal agent Highly pathogenic avian influenza virus
    Serotype H7N3
    Nature of diagnosis Clinical, Laboratory (basic)
    This event pertains to a defined zone within the country
    New outbreaks (2)
    Outbreak 1 Santiago Yaitepec, OAXACA
    Date of start of the outbreak 09/03/2015
    Outbreak status Resolved (27/03/2015)
    Epidemiological unit Backyard
    Affected animals
    Species Susceptible Cases Deaths Destroyed Slaughtered
    Birds 200 90 90 110 0
    Outbreak 2 Tehuacán, PUEBLA
    Date of start of the outbreak 09/03/2015
    Outbreak status Resolved (27/03/2015)
    Epidemiological unit Backyard
    Affected animals
    Species Susceptible Cases Deaths Destroyed Slaughtered
    Birds 324 49 4 320 0
    Summary of outbreaks Total outbreaks: 2
    Total animals affected
    Species Susceptible Cases Deaths Destroyed Slaughtered
    Birds 524 139 94 430 0
    Outbreak statistics
    Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
    Birds 26.53% 17.94% 67.63% 100.00%
    *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 Following the notification by the owners of an increase in sudden death in birds at two backyards located in the States of Oaxaca and of Puebla, animals showing clinical signs suggestive of avian influenza were identified in both outbreaks. The official veterinary services launched the necessary epidemiological investigation and the presence of highly pathogenic avian influenza virus subtype H7N3 was confirmed. Control measures implemented immediately are, among others: quarantine, movement restrictions, stamping out and sampling in the focal and perifocal areas. Both outbreaks were confirmed as positive for avian influenza on 9 March and later by determining the intravenous pathogenicity index. So far, no epidemiological link has been identified between them.
    Control measures
    Measures applied
    • Stamping out
    • Quarantine
    • Movement control inside the country
    • Screening
    • 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
    Level 3 Biosecurity Laboratory, SENASICA (National laboratory) Birds virus isolation 09/03/2015 Positive
    Future Reporting
    The event is continuing. Weekly follow-up reports will be submitted.
    .../
    http://www.oie.int/wahis_2/public/wa...reportid=17489
    "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
    -Nelson Mandela
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