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Abstract
In this study, BCG screening and tuberculin skin test (TT) were performed in 2417 first class primary students from three regions of Eskişehir city in which habitants’ socioeconomical and sociocultural levels differed; the suburbs of the city (group 1), the city center (group 2) and the private school population (group 3). At least one BCG scar was found in 2172 (89.9%) students but weren’t present in 245 (10.1%). TT was found positive in 41 (1.7%), negative in 2376 (98.3%) students. TT endurations were increasing with BCG scare number in students (p<0.001). TT endurations were correlated with BGG scare number in students and family members (r=0.333, p=0.000 and r=0.221, p=0.024 respectively). Infection prevalence was found as 0.91% in group 1, 0.25% in group 2 and 0% in group 3. Natural infection prevalence was 5.9%, 4.4% and 0% respectively. The ratio of annual risk of infection was 0.86%, 0.64% and 0% respectively. The microfilms of 41 students with TT positive were taken and their family members were examined. TT was positive in 76 (73%) and negative in 28 (27%) family members. Pulmonary lesion such as hiler enlargement and fibrotic scar ratios were found higher in students and family members with