In this study in formations of the participants were evaluated retrospectively from the file records. The total number of recorded in-house contacts of 153 pulmonary tuberculosis patients was 753 of whom 625 patients came to control and were documented for treatment and follow up in Istanbul Eyup Tuberculosis Dispensary between January 2001 and December 2002. The gender, age, occupation, closeness to index case, number of control they came, the diagnosis of household contacts and BCG scar, tuberculin skin test (TST) results, prevention therapy given or not, the period of prevention therapy in household contacts fewer than 15 were recorded. The relationship between TB frequency in household contacts and gender, age, bacteriological properties of.
