Classical swine fever,
Mexico

Information received on 01/12/2009 from Dr Francisco Velarde García, Director General de Salud Animal, Servicio Nacional de sanidad, inocuidad y calidad agroalimentaria (SENASICA) , Secretaría de Agricultura, Ganadería, Desarrollo Rural, Pesca y Alimentación (SAGARPA), Mexico DF, Mexico

Summary

Report type Immediate notification (Final report)
Start date 11/03/2009
Date of first confirmation of the event 02/04/2009
Report date 01/12/2009
Date submitted to OIE 01/12/2009
Date event resolved 14/10/2009
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 11/2005
Manifestation of disease Clinical disease
Causal agent Classical swine fever virus
Nature of diagnosis Suspicion, Clinical, Laboratory (basic), Laboratory (advanced)
This event pertains to a defined zone within the country

New outbreaks
Outbreak 1 GUERRERO, COCULA, GUERRERO
Date of start of the outbreak 12/03/2009
Outbreak status Resolved (13/10/2009)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Swine 612 0 612 0
Outbreak 2 GUERRERO, COCULA, GUERRERO
Date of start of the outbreak 11/03/2009
Outbreak status Resolved (14/10/2009)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Swine 21 2 0 21 0
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Swine 633 2 ** 0 633 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Swine ** 0.00% ** 100.00%

* 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 A pig farm used for pedagogical purposes owned by the School of Agriculture in the State of Guerrero. The farm was quarantined, the pigs were culled and sentinel animals were introduced. Simultaneously, as a result of the epidemiological investigation, another outbreak linked to the first outbreak detected was identified; the same control measures were applied: quarantine, culling, disinfection and introduction of sentinel animals.
All farms were used for production for local or own consumption. Vaccination is still prohibited throughout the country since 4 October 2006 and an active epidemiological surveillance is applied in all pig holdings in the country both technified and backyard holdings.

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

Diagnostic test results
Laboratory name and type Mexico-United States Commission for the Prevention of Foot and Mouth Disease and Other Exotic Diseases of Animals (CPA) (National laboratory)
Tests and results
Species Test Test date Result
Swine enzyme-linked immunosorbent assay (ELISA) 12/10/2009 Negative
Swine polymerase chain reaction (PCR) 02/04/2009 Positive
Swine real-time PCR 14/10/2009 Negative
Swine real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 31/07/2009 Positive
Swine virus isolation 07/04/2009 Positive

Future Reporting
The event is resolved. No more reports will be submitted.

Map of outbreak locations
Location of current outbreaks

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