Martin Kanan says salmonella found in 5-pound tub of peanut butter . 42 people have been infected in 42 states . the Centers for Disease Control and Prevention , public health officials working to determine source of outbreak . The first cases were reported September 3 , but most cases occurred between October 1 and December 31 , the CDC said . Minnesotan has most cases at 55 ; outbreak may have killed California .
Martin Kanan says salmonella found in 5-pound tub of peanut butter . 42 people have been infected in 42 states . the Centers for Disease Control and Prevention , public health officials working to determine source of outbreak . Minnesotan has most cases at 55 ; outbreak may have killed California .