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Highly pathogenic avian influenza H7N3, Mexico (OIE, July 25 2012): 3 New Poultry Outbreaks, Jalisco

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  • Highly pathogenic avian influenza H7N3, Mexico (OIE, July 25 2012): 3 New Poultry Outbreaks, Jalisco

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


    Highly pathogenic avian influenza, Mexico


    Information received on 25/07/2012 from Dr Hugo Fragoso S?nchez, 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 (SAGARPA), Mexico, Mexico
    • Summary
      • Report type Follow-up report No. 5
      • Start date 13/06/2012
      • Date of first confirmation of the event 21/06/2012
      • Report date 24/07/2012
      • Date submitted to OIE 25/07/2012
      • Reason for notification Reoccurrence of a listed disease
      • Date of previous occurrence 06/1995
      • Manifestation of disease Clinical disease
      • Causal agent Highly pathogenic avian influenza
      • Serotype H7N3
      • Nature of diagnosis Laboratory (basic), Laboratory (advanced)
      • This event pertains to a defined zone within the country
      • Related reports
        • Immediate notification (21/06/2012)
        • Follow-up report No. 1 (25/06/2012)
        • Follow-up report No. 2 (02/07/2012)
        • Follow-up report No. 3 (10/07/2012)
        • Follow-up report No. 4 (16/07/2012)
        • Follow-up report No. 5 (24/07/2012)
    • New outbreaks
      • Outbreak 1 (34) - Encarnacion de Diaz, foco 34, Encarnacion de Diaz, JALISCO
        • Date of start of the outbreak 23/07/2012
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
          • Birds ? 405611 ? 0 ? 0 ? 0 ? 0
      • Outbreak 2 (33) - Acatic, foco 33, Acatic, JALISCO
        • Date of start of the outbreak 16/07/2012
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
          • Birds ? 42592 ? 0 ? 0 ? 0 ? 0
      • Outbreak 3 (35) - Tepatitlan de Morelos, foco 35, Tepatitlan de Morelos, JALISCO
        • Date of start of the outbreak 23/07/2012
        • Outbreak status Continuing (or date resolved not provided)
        • Epidemiological unit Farm
        • Affected animals: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
          • Birds ? 502688 ? 5 ? 5 ? 0 ? 0
    • Summary of outbreaks
      • Total outbreaks: 3
      • Total animals affected: Species ? Susceptible ? Cases ? Deaths ? Destroyed ? Slaughtered
        • Birds ? 950891 ? 5 ? 5 ? 0 ? 0
      • Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
        • Birds - 0.00% - 0.00% - 100.00% - 0.00%
        • * 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
      • As part of the surveillance activities and the epidemiological investigation carried out in response to the event, the National Food Quality, Food Safety and Health Service (SENASICA) continues the epidemiological sampling in the focal, perifocal and buffer zones.
      • So far, 363 production units have been sampled.
      • A total of 32,108 samples have been obtained and 35 H7N3 viral isolates have been identified in poultry farms.
      • The population at risk in these 363 production units amounts to about 17 million birds, of which 56.2% of commercial layer farms, 29.2% of broilers, 7.44% of backyard poultry and 7.16% of breeders.
      • The focal, perifocal and buffer zones still represent a total surface area of around 22,000 square kilometres.
      • During the depopulation activities in the poultry farms, around 3.8 million birds have been slaughtered and destroyed of an affected 10.2 million bird population.
      • Planned depopulation activities will continue.
      • Control measures on the movement of birds, their products and by-products are still in place in the quarantine area.
      • Epidemiological surveillance activities continue in the focal, perifocal and buffer zones and a screening at the national level started in poultry and backyard farms.
      • It includes around 17,000 serological and virological samples which will be processed in the official laboratories and will allow to maintain adequate supervision of the outbreak for its eradication.
      • Current epidemiological parameters indicate an incidence rate of 24.58%, a mortality of 9.64% and a fatality of 39.2%.
      • As part of the measures to control and eradicate the virus, a temporary vaccine programme of birds at risk will be implemented, through the production and application of an emulsified vaccine manufactured in Mexico by the official sector.
      • Poultry farms in which the temporary vaccination would be authorized, prior risk assessment, should eliminate the vaccinated birds at the end of their productive life.
    • Control measures
      • Measures applied
        • Stamping out
        • Quarantine
        • Movement control inside the country
        • Screening
        • Zoning
        • Disinfection of infected premises/establishment(s)
        • Vaccination prohibited
        • No treatment of affected animals
      • Measures to be applied
        • No other measures
    • Future Reporting
      • The event is continuing. Weekly follow-up reports will be submitted.
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