Nontyphoidal Salmonella Infections By Larry M Bush, MD, FACP, Charles E Schmidt College of Medicine, Florida Atlantic University; Maria T Vazquez-Pertejo, MD, FACP, Wellington Regional Medical Center Reviewed / Revised Apr 2022 | Modified Sep 2022 View Patient Education Symptoms and Signs Diagnosis Treatment Prevention Key Points Topic Resources Salmonella (Skin Lesion) Overview of Salmonellosis Nontyphoidal salmonellae are gram-negative bacteria that primarily cause gastroenteritis, bacteremia, and focal infection.