What's the "een" in Halloween?
yersiniosis yer·sin·i·o·sis (yər-sĭn'ē-ō'sĭs)
An infectious disease marked by diarrhea, enteritis, ileitis, pseudoappendicitis, erythema nodosum, and sometimes septicemia or acute arthritis.
acute gastrointestinal infection caused by the bacterium Yersinia enterocolitica, characterized by fever, often-bloody diarrhea, and abdominal pain. A temporary rash called erythema nodosum also may appear on the skin, and the disease can lead to a temporary arthritis of the knees, ankles, or wrists. Frequently occurring in young children, the infection is more common during the winter months.