Clinical manifestations and outcomes of pulmonary
tuberculosis in patients with different genotypes
of the pathogen
Objective: to study the clinical manifestations and effec- tiveness of treatment of patients with pulmonary tubercu- losis with different genotypes of M. tuberculosis. Materi als and methods. Clinical and microbiological data of 120 patients were stratified on the M. tuberculosis epidemic variants: subtypes of Beijing CC2 / W148, CC1, other sub- types of Beijing, and other genotypes other than Beijing (nonBeijing). The DNA of M. tuberculosis strains obtained were genotyped by RD 105/207 for Beijing genotype iden- tification. The CC2/W148 subtype was identified by the presence of a specific deletion in the kdpD gene, the CC1 subtype was done by the SNP in the pks17 gene. Results. It was found that in tuberculosis caused by the CC2/W148 subtype of the Beijing genotype, multiple and broad drug resistance occur in 87.5% of patients. The CC2/W148 ge- no type contributes to the chronization of the tuberculosis process, the formation of fibrous-cavernous tuberculo- sis. Miliary tuberculosis is more common (37.5%) among newly diagnosed patients with CC2/W148 than in other genotypes (15.7%), which is also associated with a high incidence of concomitant HIV infection (56.3%). Total lung tissue damage in patients with infiltrative tuberculosis is observed in 41.7% of patients with the CC2/W148 MBT subtype. The clinical cure rate in patients with CC2/W148 is significantly lower (18.7% compared to 47.4%) than in tuberculosis caused by other genotypes. Conclusion. The results obtained indicate the presence of clinical features of tuberculosis caused by the w148 / CC2 subtype of the Beijing genotype, and the expediency of further study of the clinical, radiological and microbio- logical characteristics of the tuberculosis process caused by MBT of different subtypes of the Beijing genotype and non-Beijing genotypes.