Abstract
The occurrence of severe clinical forms and drug resistance requires an analysis of risk factors for tuberculosis, one of which is associated pathology. Of the 1165 chil- dren with active tuberculosis in the study 83% had comorbidities. Infectious and parasitic diseases were found in 29.4% (?2=9.764, p=0.008), and somatic at 75.2% (?2=19.031, p=0.000), the differences were significant when compared to the five-year periods. The most unfavorable structure of the clinical forms of tuberculosis was in the period from 2005 to 2010. Diseases of the musculoskeletal system and connective tissue, circulatory system are the most common among somatic diseases. These classes of somatic pathology in children should be considered as a possible background for the development of tuberculosis.