ST. PAUL, Minn. (AP) — The U.S. Department of Agriculture's chief veterinary officer says the poultry industry may have to live with a deadly bird flu strain for several years, which could be devastating. Missouri's first case of the H5N2 strain of avian influenza was confirmed in March. Dr. John Clifford says that new cases should drop close to zero once the weather warms up but there is likely to be a resurgence this fall.