25 Mar 2013

Highly pathogenic avian influenza, Mexico (OIE World Animal Health Information System, March 25 2013, edited)

[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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