Tuberculin sensitivity in infants and preschool children with pulmonary tuberculosis

: The tuberculin sensitivity of the skin was studied in children with tuberculosis, whose age was under 7 years, in relation to the age, the form of tuberculosis, the phases of a process, its severity, the presence of complications and concomitant disease. It was established that in infants the rate of negative reactions was 13.2 times higher and that of hyperergic reactions was 5.8 times less than those in children aged 3 to 7 years. Negative reactions were most common in the complicated and severe forms of tuberculosis and in comorbidity. Hyperergic reactions were more frequently encountered in ocular tuberculosis (44.5%), helminthic invasion (30.4%), and pulmonary tuberculosis first detected in the phase of resolution (32.4%).