The yersinioses are zoonotic infections of domestic and wild animals
Humans are incidental hosts that do not contribute to the natural disease cycle.
Three species are important human pathogens: Yersinia pestis, Yersinia enterocolitica, and Yersinia pseudotuberculosis
Transmission of yersiniosis is largely foodborne (including consumption of raw or undercooked pork, as well as other food sources) and occasionally waterborne.
Clinical presentation
Acute yersiniosis
The typical incubation period is 4 to 6 days (range 1 to 14 days).
Clinical manifestations include fever, abdominal pain, and diarrhea
Bloody diarrhea is observed more frequently among children.
Pharyngitis may be a presenting symptom.
Bacteremia and sepsis can occur, particularly among infants and individuals with impaired immunity or iron-overload states.
Pseudoappendicitis
Acute yersiniosis may be confused with acute appendicitis; overlapping symptoms may include right lower quadrant abdominal pain, fever, vomiting, leukocytosis, and diarrhea.