Yersiniosis is an infectious disease of the gastrointestinal tract caused by bacteria of the genus Yersinia other than Y. pestis.

[2] The infection is thought to be contracted through the consumption of undercooked meat products, unpasteurized milk, or water contaminated by the bacteria.

In older children and adults, right-sided abdominal pain and fever may be the predominant symptoms, and may be confused with appendicitis.

In a small proportion of cases, complications such as skin rash, joint pains, ileitis, erythema nodosum, and sometimes sepsis, acute arthritis[6] or the spread of bacteria to the bloodstream (bacteremia) can occur.

[5] Severe infections with systemic involvement (sepsis or bacteremia) often requires aggressive antibiotic therapy; the drugs of choice are doxycycline and an aminoglycoside.