Highly pathogenic avian influenza H7N3, Mexico (OIE, July 4 2012, edited): 14.4 mln birds in the risk area

[Giuseppe]

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


Highly pathogenic avian influenza, Mexico


Information received on 04/07/2012 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. 2
  • Start date 13/06/2012
  • Date of first confirmation of the event 21/06/2012
  • Report date 02/07/2012
  • Date submitted to OIE 04/07/2012
  • 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 virus
  • 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)
• Outbreaks
  • There are no new outbreaks in this report
• Epidemiology
  • Source of the outbreak(s) or origin of infection
    • Unknown or inconclusive
• Epidemiological comments
  • During the epidemiological surveillance carried out in response to the event, the National Food Quality, Food Safety and Health Service (SENASICA) has taken samples in the outbreaks and around the outbreaks in 58 poultry farms.
  • 24 farms were identified by viral isolation, diagnosis is ongoing in other 24 and 10 have tested negative to H7N3 highly pathogenic virus.
  • The rates obtained so far are:
    • a morbidity rate of 21.62%,
    • a mortality rate of 8.48% and
    • a fatality rate of 39.22%.
  • Around the outbreaks, 79 farms at risk have been identified, of which 60 commercial layer farms, 11 breeder farms and 8 broiler farms.
  • The population at risk in these 79 farms amounts to about 14.4 million birds, of which 86.1% of layers, 6.9% of broilers and 7% of breeders.
  • As part of the measures taken to reduce the risk, the buffer zone has been extended to 40 km around the index outbreak and includes 161 poultry farms at risk with a population of 25.8 million of birds.
  • Control measures on birds and their products movements have been strengthened in the quarantine area and eight check points have been established with the support of 26 health technicians with 9 vehicles that monitor the quarantine zone.
  • Epidemiological surveillance activities continue in the outbreaks, around the outbreaks and in the buffer zone.
  • As a measure to reduce the risk, sampling will be carried out in neighbouring States and in poultry farms at risk outside the buffer zone.
• 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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