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


Highly pathogenic avian influenza H7N3, Mexico


Information received on 08/05/2013 from Dr Joaqu?n Braulio Delgadillo ?lvarez, Director General de Salud Animal, Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria (SENASICA) Secretar?a de Agricultura, Ganader?a, Desarrollo Rural, Pesca y Alimentaci?n, Ministerio de Agricultura, Ganader?a, Desarrollo rural, Pesca y Alimentaci?n, Mexico, Mexico
  • Summary
    • Report type Follow-up report No. 7
    • Date of start of the event 03/01/2013
    • Date of pre-confirmation of the event 07/01/2013
    • Report date 07/05/2013
    • Date submitted to OIE 08/05/2013
    • Reason for notification Reoccurrence of a listed disease
    • Date of previous occurrence 29/09/2012
    • 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
    • Related reports
      • Immediate notification (08/01/2013)
      • Follow-up report No. 1 (16/01/2013)
      • Follow-up report No. 2 (18/02/2013)
      • Follow-up report No. 3 (28/02/2013)
      • Follow-up report No. 4 (23/03/2013)
      • Follow-up report No. 5 (17/04/2013)
      • Follow-up report No. 6 (23/04/2013)
      • Follow-up report No. 7 (07/05/2013)
  • New outbreaks (5)
    • Outbreak 1 - San Diego de Alejandr?a, San Diego de Alejandr?a, JALISCO
      • Date of start of the outbreak 01/03/2013
      • Outbreak status Resolved (02/03/2013)
      • Epidemiological unit Village
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds - 16 ? 11 ? 10 ? 6 ? 0
    • Outbreak 2 - San Jos? Iturbide, San Jos? Iturbide, GUANAJUATO
      • Date of start of the outbreak 03/04/2013
      • Outbreak status Resolved (04/05/2013)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds - 319398 - ? ? 0 ? 319398 ? 0
    • Outbreak 3 - Dolores Hidalgo, Dolores Hidalgo, GUANAJUATO
      • Date of start of the outbreak 10/04/2013
      • Outbreak status Resolved (11/04/2013)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds - 100601 - ? ? 0 ? 100601 ? 0
    • Outbreak 4 - Tepatitl?n de Morelos, Tepatitl?n de Morelos, JALISCO
      • Date of start of the outbreak 29/04/2013
      • Outbreak status Resolved (01/05/2013)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds - 320000 ? 0 ? 0 ? 320000 ? 0
    • Outbreak 5 - Palmar de Bravo, Palmar de Bravo, PUEBLA
      • Date of start of the outbreak 01/05/2013
      • Outbreak status Resolved (07/05/2013)
      • Epidemiological unit Farm
      • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds - 150000 ? 75000 ? 40000 ? 110000 ? 0
  • Summary of outbreaks
    • Total outbreaks: 5
      • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds ? 890015 - 75011 ** ? 40010 ? 850005 ? 0
      • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
        • Birds ? ** - 4.50% ? ** - 100.00%
        • *Removed from the susceptible population through death, destruction and/or slaughter
        • **Not calculated because of missing information
  • Epidemiology
    • Source of the outbreak(s) or origin of infection
      • Contact with wild species
  • Epidemiological comments
    • Two new outbreaks were identified in Jalisco:
      • one in a commercial layer farm in Tepatitl?n de Morelos and
      • another in a backyard farm in the municipality of San Diego de Alejandr?a.
    • In Guanajuato, two outbreaks were detected:
      • one in a heavy breeder flock in Dolores Hidalgo and
      • another in a fattening farm in the municipality of San Jos? Iturbide.
    • Moreover, a new outbreak was identified in a commercial layer farm in the municipality of Palmar de Bravo, Puebla.
    • It was confirmed by the National Reference Laboratory using virus isolation on 6 May 2013.
    • On 7 May, the farm was depopulated and control measures including cleaning and disinfection of facilities and equipment as well as sampling around the outbreak within a 10 km radius were launched, in addition to epidemiological surveillance at State level.
  • Control measures
    • Measures applied
      • Quarantine
      • Movement control inside the country
      • Screening
      • Zoning ?
      • Vaccination in response to the outbreak (s): Administrative division ? Species - Total Vaccinated ? Details
        • GUANAJUATO ? Birds ? 5512080 - Breeder and layer commercial farms
      • Disinfection of infected premises/establishment(s)
      • No treatment of affected animals
    • Measures to be applied
      • Stamping out
  • Future Reporting
    • The event is continuing. Weekly follow-up reports will be submitted.
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