Highly pathogenic avian influenza,
Mexico
Information received on 26/04/2019 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. 2
Date of start of the event 06/03/2019
Date of confirmation of the event 10/03/2019
Report date 26/04/2019
Date submitted to OIE 26/04/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 18/04/2018
Manifestation of disease Clinical disease
Causal agent Virus de la influenza aviar altamente patógena
Serotype H7N3
Nature of diagnosis Clinical, 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)
New outbreaks (2)
Outbreak 1 Colón, Queretaro
Date of start of the outbreak 08/04/2019
Outbreak status Resolved (19/04/2019)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 138632 5 0 0 138632
Affected population The presence of highly pathogenic avian influenza was detected as part of active epidemiological surveillance in a poultry production unit in five birds that were subjected to organ sampling and did not show any clinical signs, as the rest of the flock.
Outbreak 2 Mineral del Chico, Hidalgo
Date of start of the outbreak 15/04/2019
Outbreak status Resolved (23/04/2019)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 619 178 172 447 0
Affected population A rural production unit with 598 birds, detected and reported to the competent authority by a self-employed veterinarian in order to carry out appropriate epidemiological monitoring.
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 139251 183 172 447 138632
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 0.13% 0.12% 93.99% 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 Active epidemiological surveillance has been established in Mexico as well as a (passive) notification system. These two strategies have identified two outbreaks, located in the region of low prevalence in which vaccination against the H7N3 avian influenza virus is applicable subject to prior authorisation by SENASICA.
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Slaughter
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Official disposal of carcasses, by-products and waste
  • Stamping out
  • Disinfection
  • Ante and post-mortem inspections
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations