Copyright © 2017 American Academy of Pediatrics. From: Salmonella Infections Red Book® 2015, 2015 Figure Legend: Typhoid fever cholecystitis with an ulceration and perforation of the gallbladder into the jejunum. Salmonella typhi, the bacterium responsible for causing typhoid fever, has a preference for the gallbladder and, if present, will colonize the surface of gallstones, which is how people become long-term carriers of the disease. Courtesy of Centers for Disease Control and Prevention Date of download: 10/8/2017 Copyright © 2017 American Academy of Pediatrics. All rights reserved.