The significance of contacts in the development of the disease was studied in 117 first detected children and adolescents with in 2006-2009. Contacts with tuberculosis patients were established in 53% of patients. The indirect signs of contacts were found in 40% of patients, with a migration factor in 20% of cases and the poor social environment in 20%. The direct and indirect signs of contacts could not be detected in only 7%. Among the patients with established contacts, in 11% of them the contact was defined as important social relations. By the degree of hazard, this type of contact was comparable with a family contact. With the high informative value of tuberculin diagnosis in 82% of patients and with a more than one-year contact in 55%, the disease was identified in 22% of patients during planned tuberculin diagnosis and in 30% during planned study for contacts. Detection of 19% patients for complaints engages attention. The late diagnosis of the disease in children in contact is shown by the disseminated pattern or complicated course observed in 68% of patients, as well as by calcification on detection in 89% of patients with tuberculosis of intrathoracic lymph nodes. There is a need for pediatrician's higher phthisiatric alertness and the joint work of pediatricians and pthisiatricians to attract and monitor the examination and treatment of children by the results of tuberculin diagnosis, including those in contact. According to the tuberculin susceptibility, the earliest diagnosis of minor forms of tuberculosis in children in contact can be made using computed tomography.