Foodborne Illness Investigations CDC Update: 32 Listeria Illnesses in 11 States, 2 in Canada Linked to Caramel Apples On Wednesday, the U.S. Centers for Disease Control and Prevention (CDC) again updated information regarding the multi-state Listeria monocytogenes outbreak linked to caramel apples. As of Dec. 30, there By News Desk / 31 Dec 2014