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.
Outbreaks of H7N3 avian flu between 25 March and 1 April 2013 have led to almost four million poultry deaths in Guanajuato and Jalisco states, reported on 1 April 2013. Official figures indicate that 1,984,000 broilers, 847,000 breeders, and 918,221 laying hens have died, for a total of 3,749,221, on 52 farms and in four backyard flocks. In addition, more than 131 million vaccine doses have been administered to flocks in Jalisco, Aguascalientes, and Guanajuato states, as well as in nine additional “federal entities”. So far, 117 of 158 farms in Guanajuato have already been inspected by officials, and H7N3 was found on 25 of them, as well as in two of 195 backyard flocks. In Jalisco, 27 of 535 farms and two of 135 backyard flocks tested positive. The outbreaks have cost farmers $32 million. Mexico culled about 3.8 million birds in 2012 to help prevent disease spread after multiple H7N3 outbreaks in Jalisco.
Highly pathogenic H7N3 avian flu has killed more than 400,000 poultry on nine farms and in four village flocks in Jalisco and Guanajuato states in Mexico, according to the World Organization for Animal Health (OIE) on 23 March 2013. Among almost 2.5 million susceptible birds, officials have confirmed 473,306 cases and 406,509 poultry deaths in the 13 outbreaks combined. On the farms, outbreaks have ranged from 100 to 396,200 cases and from 100 to 388,499 bird deaths. Five of the nine affected farms are in Guanajuato, but the farm that houses almost 400,000 of the infected birds is in Jalisco. The village outbreaks have affected just a handful of birds at each of four locations, two in each state. All of the outbreaks began in February 2013. The two states have been at the center of H7N3 outbreaks in 2012 and 2013 that have killed millions of birds.