Aujeszky’s disease,
Mexico
Information received on 15/10/2019 from Dr. Juan Gay Gutiérrez, Director General de Salud Animal, Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria (SENASICA), Secretaría de Agricultura y Desarrollo Rural (SADER), Ciudad de Mexico, Mexico
Summary
Report type Immediate notification
Date of start of the event 27/08/2019
Date of confirmation of the event 24/09/2019
Report date 14/10/2019
Date submitted to OIE 15/10/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 09/2015
Manifestation of disease Sub-clinical infection
Causal agent Aujeszky's disease virus
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (14/10/2019)
Follow-up report No. 1 (23/10/2019)
Follow-up report No. 2 (08/11/2019)
New outbreaks (5)
Outbreak 1 Teloloapan, Guerrero
Date of start of the outbreak 27/08/2019
Outbreak status Resolved (05/11/2019)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 147 4 0 147 0
Affected population As part of the active epidemiological surveillance, a rural farm with 147 pigs that did not show clinical signs gave positive serological results for Aujeszky's disease.
Outbreak 2 Jaumave, Tamaulipas
Date of start of the outbreak 05/09/2019
Outbreak status Resolved (18/10/2019)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 7 1 0 7 0
Affected population As part of the active epidemiological surveillance, a backyard with sevenpigs that did not show clinical signs gave positive serological results for Aujeszky's disease.
Outbreak 3 Jaumave, Tamaulipas
Date of start of the outbreak 05/09/2019
Outbreak status Resolved (18/10/2019)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 5 1 0 5 0
Affected population As part of the active epidemiological surveillance, a backyard with five pigs that did not show clinical signs gave positive serological results for Aujeszky's disease.
Outbreak 4 Mainero, Tamaulipas
Date of start of the outbreak 05/09/2019
Outbreak status Resolved (14/10/2019)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 6 1 0 6 0
Affected population As part of the active epidemiological surveillance, a backyard with six pigs that did not show clinical signs gave positive serological results for Aujeszky's disease.
Outbreak 5 Mainero, Tamaulipas
Date of start of the outbreak 05/09/2019
Outbreak status Resolved (14/10/2019)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 8 1 0 8 0
Affected population As part of the active epidemiological surveillance, a backyard with eight pigs that did not show clinical signs gave positive serological results for Aujeszky's disease.
Summary of outbreaks Total outbreaks: 5
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 173 8 0 173 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Swine 4.62% 0.00% 0.00% 100.00%
*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 active epidemiological surveillance, the serological presence of Aujeszky's disease was detected in four backyards in Tamaulipas State and in one pig farm in Guerrero State without clinical signs. In all five outbreaks, ELISA and serological neutralization test results were positive. So far, the virus has not been isolated. Producers in the area were advised to immediately inform official veterinarians of the presence of characteristic signs of the disease and to avoid the movement of pigs and the introduction of herds presenting a risk in the area.
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Official disposal of carcasses, by-products and waste
  • Disinfection
  • Slaughter
  • Ante and post-mortem inspections
Diagnostic test results
Laboratory name and type Species Test Test date Result
SENASICA level 3 Biosafety Laboratory (National laboratory) Swine enzyme-linked immunosorbent assay (ELISA) 18/09/2019 Positive
SENASICA level 3 Biosafety Laboratory (National laboratory) Swine seroneutralization test (SNT) 24/09/2019 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations