[Infectiousness by Mycobacterium tuberculosis of children from tuberculous infection foci with different degree of epidemiological risk].

The examination of 2871 children from tuberculosis foci demonstrates that epidemiological risk for children exists not only in conditions of contact with active pulmonary tuberculosis carriers, but also in contact with subjects having marked residual posttuberculous alterations. This supports the validity of referring children in contact with patients from register group VII to tuberculosis risk groups.