Features of the lung microbiota in tuberculosis infection

Normal lung microbiota is a small number of transient microbes; however, respiratory pathology may be associated with persistent microbial colonization of the lungs. It remains a poorly understood and mysterious part of the pathogenesis of tuberculosis infection.The review considers the general pathogenetic mechanisms of the effect of lung microbiota in respiratory pathology and presents the main methodological difficulties in the study of the lung microbiome. This review is aimed at analyzing the results of the available studies on diverse microbial composition of human lungs in tuberculosis using metagenomic sequencing methods. Despite high variability of the presented data, we can conclude that dysbiosis in tuberculosis is more often characterized by a decrease in bacterial diversity and enrichment of lung microbiota with anaerobic bacteria. Acinetobacter, Campylobacter, Moraxella, Pseudomonas, Staphylococcus, and Streptococcus, as well as some other microorganisms are indicated as important pathogenetic factors of dysbiosis in pulmonary tuberculosis, the role of which is yet to be elucidated.