The individual in this case, a Sergeant in the U. S. Army, was stationed on the island of Leyte in the Philippines from about November 25, 1944 to December 10, 1944. While there, he bathed in a slow-running stream. Snails were noted along the banks and native villages bordered the river. About December 16 he noted angioneurotic swellings which appeared first about both eyes and then involved the entire face. This lasted three days and was associated with chills and fever. The temperature ranged from 100° to 103°F. The fever lasted for two weeks and was followed by a dry nocturnal cough which persisted for three weeks. With the pyrexia, the patient experienced weakness and anorexia. At the same time that the cough appeared, about January 1, 1945, grouped pruritic papules developed on the right subchondral wall. A similar small cluster developed on the right side of the scrotal sac, but disappeared after four days.