Subpopulation Structure of IFNγ-Producing T Lymphocytes in Patients with Pulmonary Tuberculosis.

The study of subpopulation structure of IFNγ-producing T cells in patients with pulmonary tuberculosis revealed a decrease in the number of CD3+ IFNγ+ cells against the background of significantly increased IFNγ secretion in vitro irrespective of the clinical form of the disease and drug sensitivity of M. tuberculosis, most strongly expressed in case of the disseminated tuberculosis. In patients with infiltrative drug-sensitive and drug-resistant pulmonary tuberculosis, increased number of Th1/Th17 lymphocytes (CD4+ IFNγ+IL-17A+) and, conversely, decreased number of blood γδT cells was detected.