Copyright © 2017 American Academy of Pediatrics. From: P Red Book® 2015, 2015 Figure Legend: This photograph shows a ground squirrel that died due to a plague infection, Yersinia pestis. Field rodents, such as western ground squirrels and prairie dogs, may be a threat when their burrows are beside labor camps and residential areas because they and their fleas are carriers of the plague bacteria. Courtesy of Centers for Disease Control and Prevention Date of download: 11/10/2017 Copyright © 2017 American Academy of Pediatrics. All rights reserved.