https://en.wikipedia.org/wiki/Chitterlings

are a food most commonly made from the small intestines of pigs

Disease can be spread by chitterlings not cleaned properly and undercooked. Pathogens include E. coli, Yersinia enterocolitica, and Salmonella.[1] Chitterlings are often soaked and rinsed thoroughly in several different cycles of cool water, and repeatedly picked clean by hand. They may then be turned inside out, cleaned and boiled, sometimes in baking soda or salt, and the water discarded.