Information received on 01 Dec 2009 from Dr Francisco Velarde Garcia,
Director General de Salud Animal, Secretaria de Agricultura,
Ganaderia, Desarrollo Rural, Pesca y Alimentacion (Sagarpa),
Secretaria de Agricultura, Ganaderia, Desarrollo Rural, Pesca y
Alimentacion (Sagarpa), Mexico DF, Mexico

Summary
Report type: Immediate notification (Final report)
Start date 11 Mar 2009
Date of 1st confirmation of the event 02 Apr 2009
Report date 01 Dec 2009
Date submitted to OIE 01 Dec 2009
Date event resolved 14 Oct 2009
Reason for notification: Reoccurrence of a listed disease
Date of previous occurrence November 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 Mar 2009
Outbreak status Resolved (13 Oct 2009)
Epidemiological unit: Farm
Species Swine
Susceptible 612
Cases
Deaths 0
Destroyed 612 Slaughtered 0

Outbreak 2 Guerrero, Cocula, Guerrero
Date of start of the outbreak 11 Mar 2009
Outbreak status Resolved (14 Oct 2009)
Epidemiological unit: Farm
Species Swine
Susceptible 21
Cases 2
Deaths 0
Destroyed 21
Slaughtered 0

Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Swine
Susceptible 633
Cases 2**
Deaths 0
Destroyed 633
Slaughtered 0

Outbreak statistics
Species Swine
Apparent morbidity rate **
Apparent mortality rate 0.00 percent
Apparent case fatality rate **
Proportion susceptible animals lost* 100.00 percent
* 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 1st 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 Oct 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

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)

Species Swine
Test enzyme-linked immunosorbent assay (ELISA)
Test date 12 Oct 2009
Result Negative

Species Swine
Test polymerase chain reaction (PCR)
Test date 02 Apr 2009
Result Positive

Species Swine
Test real-time PCR
Test date 14 Oct 2009
Result Negative

Species Swine
Test Swine real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)
Test date 31 Jul 2009
Result Positive

Species Swine
Test Swine virus isolation
Test date 07 Apr 2009
Result Positive

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

Date: 1 Dec 2009
Source: OIE WAHID (World Animal Health Information Database) Disease
Information 2009; 22(49)
<http://www.oie.int/wahis/public.php?page=single_report&pop=1&reportid=8675>