English: This 1952 image depicted the left foot of a patient, which displayed this acute tropical ulcer upon his admission to Goroka Hospital, in Goroka, New Guinea. At the time of this photograph, the cause of this infection was unknown, however, the cause of such ulcerative wounds is usually found to be fusiform bacilli and spirochetes. See PHIL 12178 for the appearance of this acute ulcerative lesion jafter seven days of hospitalization. The town of Goroka is situated at an altitude of 5,200 feet. Usually beginning as a cutaneous abrasion, or wound, the acute tropical ulcer is known to occur in tropical regions with high heat and humidity, and to individuals with compromised immune systems, who's affected skin was in an unhealthy state. A serous-filled bulla, or blister-like covering, developes at the wound site, which eventually ruptures, releasing its contents of necrotic tissue and fluid, thereby, exposing a granulomatous wound base.