The strains, which are multiple, mutate readily and are named after the two protein groups in the virus. The rate of outbreak has increased over the past week and includes a case in a North Dakota turkey flock reported today,Yesterday we wrote in the Livestock Roundup about the market implications of the recent outbreaks of the H5N2 strain of high pathogenic avian influenza (HPAI). Today is a closer look at the situation by the numbers. There have been 72 cases reported between 19 December 2014 and 22 April 2015 as well as two cases of H5N8 low pathogenic avian influenza (LPAI) in California (one in January and one in February). These have occurred in 13 states and 42 counties located in three migratory bird flyways with 56 in the Mississip...