The portal of entry is the gastrointestinal tract. The organism is acquired usually by insufficiently cooked pork or contaminated water, meat, or milk. In recent<unk> ars<unk>  has increasingly been causing smaller outbreaks via Ready-To-Eat (RTE) vegetables. Acute<unk>  infections usually lead to mild self-limiting enterocolitis or terminal ileitis and adenitis in humans. Symptoms may include watery or bloody diarrhea and fever, resembling appendicitis or salmonellosis or shigellosis. After oral uptake,<unk> rsinia species replicate in the terminal ileum and invade Peyer's patches. From here they can disseminate further to mesenteric lymph nodes causing lymphadenopathy. This condition can be confused with appendicitis, so is called pseudoappendicitis. In immunosuppressed individuals, they can disseminate from the gut to the liver and spleen and form abscesses. Because<unk> rsinia species are siderophilic (iron-loving) bacteria, people with hereditary hemochromatosis (a disease resulting in high body iron levels) are more susceptible to infection with<unk> rsinia (and other siderophilic bacteria). In fact, the most common contaminant of stored blood is<unk> . See<unk> rsiniosis for further details.
Yersinia enterocolitica
Campylobacter jejuni
Campylobacter upsaliensis
Yersinia rohdei
Yersinia pseudotuberculosis
Enteroaggregative Escherichia coli
Clostridioides difficile 
Vibrio cholerae