First, the Centers for Disease Control and Prevention warned us not to kiss or costume our chickens. Now, the agency is telling us not to pet or give turtles as gifts. Pet turtles are at the heart of a multistate outbreak of salmonella outbreak, the CDC said Tuesday. There have been 37 cases in 13 states since March, and the outbreak has sent at least 16 people to the hospital, though there have been no deaths. Twelve of the cases were in children 5 or younger.