This study, an 11 months' intensive case-finding survey, is based on the client population of the Salvation Army Men's Social Service Center in Minneapolis. The center provides a rehabilitation program for homeless men. The majority of these men come on self-referral from "Skid Row," although, at any given time, about 10% of the clients have been referred for rehabilitation as physically handicapped; 10% as parolees and probationers, and about 10% as provisional dischargees from the state hospital system. About 70% of the client population regards the abusive use of alcohol as its major problem. For five years preceding the start of this study, the center depended on the periodic visits of the Christmas Seal Mobile X-Ray Unit of the Hennepin County Tuberculosis Association to check the health status in regard to tuberculosis. During this period, no noticeable difference in incidence between the population here and the general population in Minneapolis