Highly pathogenic avian influenza H7N3, Mexico (OIE, March 25 2013): 13 New Poultry Outbreaks

[Giuseppe]

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


Highly pathogenic avian influenza, Mexico


Information received on 23/03/2013 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 Follow-up report No. 4
  • Date of start of the event 03/01/2013
  • Date of pre-confirmation of the event 07/01/2013
  • Report date 23/03/2013
  • Date submitted to OIE 23/03/2013
  • 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), Laboratory (advanced)
  • 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)
• New outbreaks (13)
  • Outbreak 1 - Tepatitán de Morelos, Tepatitlán de Morelos, JALISCO
    • Date of start of the outbreak 12/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 178029 – 3000 – 3000 – 0 – 0
      • Affected population Four commercial flocks of layers
  • Outbreak 2 - Dolores Hidalgo, Dolores Hidalgo, GUANAJUATO
    • Date of start of the outbreak 15/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 38739 – 6081 – 5125 – 0 – 0
  • Outbreak 3 - Lagos de Moreno, Lagos de Moreno, JALISCO
    • Date of start of the outbreak 19/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 1752391 – 396200 – 388499 – 0 – 0
      • Affected population 15 flocks of broilers
  • Outbreak 4 - Encarnación de Díaz, Encarnación de Díaz, JALISCO
    • Date of start of the outbreak 20/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 374699 – 39644 – 7100 – 0 – 0
      • Affected population Two flocks of broilers
  • Outbreak 5 - Lagos de Moreno, Lagos de Moreno, JALISCO
    • Date of start of the outbreak 20/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 2000 – 100 – 100 – 0 – 0
      • Affected population A commercial flock of layer Japanese quails
  • Outbreak 6 - Juventino Rosas, Juventino Rosas, GUANAJUATO
    • Date of start of the outbreak 25/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Village
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 43 – 3 – 3 – 0 – 0
  • Outbreak 7 - Dolores Hidalgo, Dolores Hidalgo, GUANAJUATO
    • Date of start of the outbreak 25/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 34317 – 16699 – 329 – 0 – 0
  • Outbreak 8 - Tepatitlán de Morelos, Tepatitlán de Morelos, JALISCO
    • Date of start of the outbreak 25/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 10 – 3 – 2 – 0 – 0
      • Affected population Backyard poultry
  • Outbreak 9 - Dolores Hidalgo, Dolores Hidalgo, GUANAJUATO
    • Date of start of the outbreak 25/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 7452 – 2100 – 1405 – 0 – 0
  • Outbreak 10 - San Miguel de Allende, San Miguel de Allende, GUANAJUATO
    • Date of start of the outbreak 26/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 42719 – 9464 – 944 – 0 – 0
  • Outbreak 11 - Comonfort, Comonfort, GUANAJUATO
    • Date of start of the outbreak 27/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 22900 - … - 0 – 0 – 0
  • Outbreak 12 - Unión de San Antonio, Unión de San Antonio, JALISCO
    • Date of start of the outbreak 27/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Farm
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed - Slaughtered
      • Birds - 11 – 6 – 0 – 0 – 0
      • Affected population Backyard poultry
  • Outbreak 13 - San Miguel de Allende, San Miguel de Allende, GUANAJUATO
    • Date of start of the outbreak 28/02/2013
    • Outbreak status Continuing (or date resolved not provided)
    • Epidemiological unit Village
    • Affected animals: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds - 70 – 6 – 2 – 0 – 0
• Summary of outbreaks
  • Total outbreaks: 13
    • Total animals affected: Species – Susceptible – Cases – Deaths – Destroyed – Slaughtered
      • Birds – 2453380 - 473306 ** – 406509 – 0 – 0
    • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
      • Birds – ** - 16.57% – ** - 16.57%
      • *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
    • Unknown or inconclusive
• Epidemiological comments
  • Following the epidemiological investigation on the event occurred in Guanajuato, 7 outbreaks due to highly pathogenic avian influenza virus were identified (5 heavy breeder farms and 2 backyards) with a total affected population of 146,240 birds.
  • These outbreaks were located in the municipalities of Dolores Hidalgo (4), Juventino Rosas (1) and San Miguel de Allende (2).
  • In Jalisco, 2 outbreaks in broiler farms, one in Lagos de Moreno (15 flocks) and another in Encarnación de Díaz (2 flocks) were identified.
  • In commercial layer farms, one outbreak was identified in Tepatitlán de Morelos (4 flocks), one in quails (Lagos de Moreno) and 2 in backyards (Tepatitlán de Morelos and Unión de San Antonio).
  • The affected population is 2,307,140 birds.
  • Simultaneously, depopulation activities have begun in the affected farms and preventive vaccination is still on-going in high risk birds.
  • From January to 15 March 2013, 44.6 million doses were applied.
• 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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