OIE: Low pathogenic avian influenza (poultry), Mexico

Information received on 22/06/2012 from Dr Hugo Fragoso Sánchez, Director general de salud animal, Servicio nacional de sanidad, inocuidad y calidad agroalimentaria (SENASICA), Secretaría de Agricultura, ganadería,desarrollo rural, pesca y alimentación (SAGARPA), Mexico, Mexico

Summary

Report type	Immediate notification
Start date	13/06/2012
Date of first confirmation of the event	21/06/2012
Report date	21/06/2012
Date submitted to OIE	22/06/2012
Reason for notification	First occurrence of a listed disease
Manifestation of disease	Clinical disease
Causal agent	Low pathogenic avian influenza virus
Serotype	H7
Nature of diagnosis	Laboratory (basic)
This event pertains to	a defined zone within the country

New outbreaks

Summary of outbreaks

Total outbreaks: 3

Location(s)

JALISCO (Tepatitlan de Morelos, Pegueros; Acatic, Tierras Coloradas; Tepatitlan de Morelos, Valle de Guadalupe)

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	1042039	587160	211242	60000	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	56.35%	20.27%	35.98%	**

* Removed from the susceptible population through death, destruction and/or slaughter
** Not calculated because of missing information

Epidemiology

Source of the outbreak(s) or origin of infection

Unknown or inconclusive

Epidemiological comments

An epidemiological investigation is being conducted. The event includes 3 commercial layer farms. The birds showed: gasping, depression, lethargy, drooping wings, prostration, fever and death. The birds are 32, 72, 75, 84 and 94 weeks old. Isolates are being tested by intravenous pathogenicity test to determine their pathogenicity and by gene sequencing. Epidemiological investigation is on-going to establish the extent of the problem and the source of infection in order to implement additional measures to rapidly resolve the problem. Additional sampling is underway to identify the possible presence of other pathogens involved in the outbreaks.

Note by the OIE Animal Health Information Department: H5 and H7 avian influenza in its low pathogenic form in poultry is a notifiable disease as per Chapter 10.4. on avian influenza of the Terrestrial Animal Health Code (2011).

Control measures

Measures applied	Quarantine Movement control inside the country Screening Zoning Disinfection of infected premises/establishment(s) Modified stamping out No vaccination No treatment of affected animals
Measures to be applied	Stamping out

Diagnostic test results

Laboratory name and type

Biosecurity Laboratory Level 3 (National laboratory)

Tests and results

Species	Test	Test date	Result
Birds	virus isolation	21/06/2012	Positive

Future Reporting

The event is continuing. Weekly follow-up reports will be submitted.