Five commercial turkey farms in South Dakota have now been infected with a bird flu strain that’s led to the deaths of more than 250,000 turkeys in the state and over 2.4 million birds in the Midwest. The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service confirmed the H5N2 strain of avian influenza in a flock of 66,000 birds in a Roberts County farm in the far northeastern corner of the state, which is South Dakota’s largest outbreak to date.