The World Organization for Animal Health (OIE) announced Feb. 18 that Mexico's animal health agency (SENASICA) reported to the international animal health body that it had identified nine outbreaks of highly pathogenic H7N3 avian influenza in Mexico's state of Guanajuato.
SENASICA said the outbreaks occurred in seven breeder farms and two commercial layer farms and affected 647,742 birds, of which 34,889 died and 53,553 were ill.
OIE said, in addition to the depopulation activities, SENASICA launched a preventive vaccination program in breeder and layer farms in Guanajuato. The epidemiological investigation is ongoing and the first results suggest the introduction of the virus through fomites and biosecurity failures.
Mexico had reported outbreaks of H7N3 avian flu in the states of Jalisco and Aguascalientes in January.