Five outbreaks of H7N3 avian flu in poultry in Mexico’s Jalisco, Guanajuato, and Puebla states have killed 40,010 birds and led to the culling of 850,005 others, the World Organization for Animal Health (OIE) reported 8 May 2013. Two of the outbreaks were in Jalisco, including one that began 1 March 2013 in a 16-bird backyard flock and one that affected 320,000 birds from 29 April to 2 May 2013 on a commercial layer farm. Two outbreaks in early April 2013 were confirmed in Guanajuato, one in a heavy breeder flock and one on a fattening farm. On one farm 319,398 birds were culled, and on the other 100,601 birds were culled to prevent disease spread. The final outbreak, in Puebla, began 1 May 2013 and was resolved 7 May 2013. It involved by far the most poultry killed by the virus, 40,000, with 110,000 additional birds culled. All told, 890,015 poultry died in the five outbreaks and culls. In April 2013, Mexican authorities said that recent H7N3 outbreaks had destroyed almost four million poultry and cost farmers about $32 million.
(CIDRAP 5/8/2013)