Highly pathogenic avian influenza,
Mexico
Information received on 09/04/2015 from Dr Joaquín Braulio Delgadillo Álvarez, Director General de Salud Animal, Servicio Nacional de Sanidad, Inocuidad y Calidad Agroalimentaria (SENASICA) Secretaría de Agricultura, Ganadería, Desarrollo Rural, Pesca y Alimentación, Ministerio de Agricultura, Ganadería, Desarrollo rural, Pesca y Alimentación, Mexico, Mexico
Summary
Report type Immediate notification
Date of start of the event 09/03/2015
Date of confirmation of the event 09/03/2015
Report date 08/04/2015
Date submitted to OIE 09/04/2015
Reason for notification Reoccurrence of a listed disease
Date of previous occurrence 09/2014
Manifestation of disease Clinical disease
Causal agent Highly pathogenic avian influenza virus
Serotype H7N3
Nature of diagnosis Clinical, Laboratory (basic)
This event pertains to a defined zone within the country
New outbreaks (2)
Outbreak 1 Santiago Yaitepec, OAXACA
Date of start of the outbreak 09/03/2015
Outbreak status Resolved (27/03/2015)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 200 90 90 110 0
Outbreak 2 Tehuacán, PUEBLA
Date of start of the outbreak 09/03/2015
Outbreak status Resolved (27/03/2015)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 324 49 4 320 0
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Destroyed Slaughtered
Birds 524 139 94 430 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 26.53% 17.94% 67.63% 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 Following the notification by the owners of an increase in sudden death in birds at two backyards located in the States of Oaxaca and of Puebla, animals showing clinical signs suggestive of avian influenza were identified in both outbreaks. The official veterinary services launched the necessary epidemiological investigation and the presence of highly pathogenic avian influenza virus subtype H7N3 was confirmed. Control measures implemented immediately are, among others: quarantine, movement restrictions, stamping out and sampling in the focal and perifocal areas. Both outbreaks were confirmed as positive for avian influenza on 9 March and later by determining the intravenous pathogenicity index. So far, no epidemiological link has been identified between them.
Control measures
Measures applied
  • Stamping out
  • Quarantine
  • Movement control inside the country
  • Screening
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Level 3 Biosecurity Laboratory, SENASICA (National laboratory) Birds virus isolation 09/03/2015 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
.../
http://www.oie.int/wahis_2/public/wa...reportid=17489