Authorities in Mexico have reported isolation of H5N1 virus to the World Organization of Animal Health. A Blue-winged teal (Anus carolinensis) was identified as a carrier of H5N1 as part of the SENASICA surveillance of wild migratory birds. The infected bird was within the Pequeros wetland in the Municipality of Morelos in Jalisco state. The program is under the auspices of the United States-Mexico Commission for the Prevention of Foot-and-Mouth Disease and Other Exotic Animal Diseases.  It is noted that Jalisco state has a high density of commercial poultry. 

Inevitably Mexico has encountered a case in a commercial farm with a report of an outbreak in a 60,000 bird commercial flock in Montemorales, in central Nuevo Leon State, that adjoins the border with Texas.

Surveillance has also detected HPAI involving H5N1 in a backyard flock in Chiapas State bordering Guatemala. This is of concern as the location of the two cases suggests widespread dissemination of virus in Mexico, presumably by southward movement of migratory birds.