Highly pathogenic avian influenza,
Mexico
Information received on 07/09/2019 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 Follow-up report No. 8
Date of start of the event 06/03/2019
Date of confirmation of the event 10/03/2019
Report date 06/09/2019
Date submitted to OIE 07/09/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 18/04/2018
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H7N3
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (01/04/2019)
Follow-up report No. 1 (16/04/2019)
Follow-up report No. 2 (26/04/2019)
Follow-up report No. 3 (17/05/2019)
Follow-up report No. 4 (04/06/2019)
Follow-up report No. 5 (19/06/2019)
Follow-up report No. 6 (08/07/2019)
Follow-up report No. 7 (26/07/2019)
Follow-up report No. 8 (06/09/2019)
Follow-up report No. 9 (11/10/2019)
Follow-up report No. 10 (30/10/2019)
New outbreaks (2)
Outbreak 1 Tototlan, Jalisco
Date of start of the outbreak 08/08/2019
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 153305 5 0 0 0
Affected population Tracheal swabs samples were taken in a commercial layers farm without clinical signs, in the framework of the epidemiological surveillance.
Outbreak 2 Ezequiel Montes, Queretaro
Date of start of the outbreak 15/08/2019
Outbreak status Resolved (14/09/2019)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 398312 5 0 398312 0
Affected population Tracheal swabs samples were taken in a fattening birds farm without clinical signs, in the framework of the epidemiological surveillance.
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 551617 10 0 398312 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 0.00% 0.00% 0.00% 72.21%
*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 Two outbreaks were identified within the framework of the epidemiological surveillance; the first one, in a commercial layers farm in Tototlán township (Jalisco), where a 2.55 IVPI was obtained, and the second one, in a fattening birds farm in Ezequiel Montes township (Querétaro). In both outbreaks, the virus was isolated, and quarantine was applied. The States of Jalisco and Querétaro have a sanitary condition with low prevalence and the vaccine against H7N3 avian influenza virus is applied, following prior authorization from SENASICA. Besides, as regards outbreaks in Colón (Querétaro) and Dolores Hidalgo (Guanajuato), IVPI obtained were respectively 2,29 and 2,62.
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Official disposal of carcasses, by-products and waste
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Stamping out
  • Disinfection
  • Slaughter
  • Ante and post-mortem inspections
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations