OIE: Highly pathogenic avian influenza, Mexico

Information received on 04/05/2017 from MVZ 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, México, Mexico

Summary

Report type	Immediate notification
Date of start of the event	18/04/2017
Date of confirmation of the event	28/04/2017
Report date	04/05/2017
Date submitted to OIE	04/05/2017
Reason for notification	Recurrence of a listed disease
Date of previous occurrence	11/05/2016
Manifestation of disease	Sub-clinical infection
Causal agent	Highly pathogenic avian influenza virus
Serotype	H7N3
Nature of diagnosis	Laboratory (advanced)
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 1

Outbreak Location

JALISCO ( Tepatitlán de Morelos, Tepatitlán de Morelos )

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	151132	10	0	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	0.01%	0.00%	0.00%	0.00%

* 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 active surveillance on-going in Altos de Jalisco area, H7N3 avian influenza virus was isolated in a commercial layer farm. The flock had been vaccinated against the disease 18 weeks beforehand; birds did not show any clinical signs. A 3km outbreak area and a 10km area around the outbreak were established, and three other farms from the same company, that are empty, were identified in the area around the outbreak. The farm is under quarantine and the birds were sent to an authorized slaughterhouse near the site. Epidemiological investigation is on-going.

Control measures

Measures applied	Movement control inside the country Quarantine Zoning Vaccination prohibited No treatment of affected animals
Measures to be applied	Disinfection / Disinfestation Stamping out Official destruction of animal products

Diagnostic test results

Laboratory name and type

Level 3 Biosecurity Laboratory, SENASICA ( National laboratory )

Tests and results

Species	Test	Test date	Result
Birds	gene sequencing	28/04/2017	Positive
Birds	intravenous pathogenicity index (IVPI) test	26/04/2017	Positive
Birds	real-time reverse transcriptase/polymerase chain reaction (RRT-PCR)