XDR-TB Transmitted from Mother to 10-Month-Old Infant: Diagnostic and Therapeutic Problems.

Drug-resistant TB (DR-TB) in children is a special epidemiological, clinical, and diagnostic problem, and its global incidence remains unknown. DR-TB in children is usually of a primary nature and is most often transmitted to the child from a household contact, so these cases reflect the prevalence of DR-TB in the population of adult patients. The risk of infection with complex (MTBC) in children depends on age, duration of exposure, proximity of contact with the infected person, and the level of source virulence.