Evaluation of Salmonella occurrence in domestic animals and humans in North Dakota (2000-2005).

Objectives: To evaluate the occurrence, serotypes, and antimicrobial susceptibility of Salmonellae from domestic animals and humans in North Dakota. Materials and methods: Salmonellosis data (2000–2005) in humans (n = 286) and animals (n = 258) were extracted from the North Dakota Department of Health (NDDoH) and North Dakota State University Veterinary Diagnostic Laboratory (NDSU-VDL), and analyzed for temporal and spatial trends, and for other associations. Additionally, random samples of 35, 30, and 15 Salmonella isolates from NDSU-VDL, NDDoH, and North Dakota healthy cattle, respectively, were tested for antimicrobial susceptibility. Results: Most animal salmonellosis occurred in cattle (64.7%) sheep (12%), pigs (10.9%), and bison (0.4%) with Salmonella Typhimurium (45.7%) as the predominant serotype; Salmonella Arizona (10.9%) and Dublin (10.5%) were host specific in sheep and cattle respectively. In humans, Salmonella Typhimurium (32.5%) and Salmonella Newport (11.2%) were predominant. Season influe...