Abacillary tuberculosis is presented by all clinical forms among which tuberculosis of intrathoracic lymph nodes, infiltrative and focal pulmonary tuberculosis are common. Abacillary tuberculous processes are restrictive: the involvement of 1-2 segments of the lung is observed in 95% of cases, that of 1-2 groups of intrathoracic lymph nodes is in 87.5%. Detection rates are 36% at tuberculin diagnosis, 30% at fluorography, and 14% on examination of those in contact with a patient with tuberculosis. Abacillary tuberculosis is asymptomatic. Its major clinical (intoxication and pulmonary) syndromes are commonly mild in 97.8%. The clinical manifestations of the disease are somewhat more pronounced in patients with infiltrative pulmonary tuberculosis.