[Source: OIE, full page: (LINK). Edited.]
Highly pathogenic avian influenza, Mexico
Information received on 08/01/2013 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
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Highly pathogenic avian influenza, Mexico
Information received on 08/01/2013 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 Immediate notification
- Date of start of the event 03/01/2013
- Date of pre-confirmation of the event 07/01/2013
- Report date 08/01/2013
- Date submitted to OIE 09/01/2013
- Reason for notification First occurrence of a listed disease
- 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
- New outbreaks
- Summary of outbreaks
- Total outbreaks: 2
- Outbreak Location: AGUASCALIENTES ( San Francisco de los Romo, San Francisco de los Romo Aguascalientes, Aguascalientes )
- Total animals affected - Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
- Birds - 284755 - 2990 ** - 740 - 0 - 284015
- Total animals affected - Species - Susceptible - Cases - Deaths - Destroyed - Slaughtered
- Outbreak statistics: Species - Apparent morbidity rate - Apparent mortality rate - Apparent case fatality rate - Proportion susceptible animals lost*
- Birds - ** - 0.26% - ** - 100.00%
- * Removed from the susceptible population through death, destruction and/or slaughter;
- Summary of outbreaks
- Epidemiology
- Source of the outbreak(s) or origin of infection
- Unknown or inconclusive
- Source of the outbreak(s) or origin of infection
- Epidemiological comments
- The last outbreak of highly pathogenic avian influenza serotype H7N3 occurred in September 2012 in the northeastern part of the State of Jalisco.
- Following control and eradication measures, passive and active surveillance was strengthened and on 3 January 2013 SENASICA was informed of an increase in mortality and a decrease of egg production on a commercial layer farm in the State of Aguascalientes.
- Timely notification from the farmer and surveillance activities allowed immediate depopulation of the two affected production units, reason why both outbreaks identified are closed.
- The first outbreak had a population of 146,755 birds aged 21-80 weeks, of which 2,990 sick and 740 dead.
- Clinical signs were conjunctivitis, edema, cyanosis and palpebral, comb and chin swelling as well as opisthotonos and sudden death.
- Additionally, during post-mortem inspections, hemorrhages were identified in trachea, lungs and tonsils.
- Control measures included vaccination of laying and breeding hens within the zone around the outbreaks and the buffer zone and the strengthening of biosecurity and control of poultry goods movements.
- The second outbreak was detected during active surveillance conducted in the State of Aguascalientes and the virus was isolated in another commercial layer farm with a population of 138,000 birds over 81 weeks old, which was also depopulated.
- In both outbreaks, cleaning and disinfection of facilities and equipment as well as destruction of hen manure have been carried out.
- After depopulation, sentinel birds will be introduced in order to confirm the absence of infection and viral circulation.
- Active and passive surveillance continues at national level. Epidemiological investigation is on-going.
- 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
- Measures applied
- Diagnostic test results
- Laboratory name and type - Biosecurity Laboratory Level 3, Mexico-United States Commission for the Prevention of Foot and Mouth Disease and Other Exotic Diseases of Animals ( National laboratory )
- Tests and results: Species - Test - Test date - Result
- Birds - virus isolation - 07/01/2013 - Positive
- Tests and results: Species - Test - Test date - Result
- Laboratory name and type - Biosecurity Laboratory Level 3, Mexico-United States Commission for the Prevention of Foot and Mouth Disease and Other Exotic Diseases of Animals ( National laboratory )
- Future Reporting
- The event is continuing. Weekly follow-up reports will be submitted.
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