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Pseudomonas aeruginosa. Assistants and competitors in the microbiome of infected of cystic fibrosis patients’ lungs

[Cystic fibrosis]
Olga Lvovna Voronina; Natalia Nikolaevna Ryzhova; Marina Sergeevna Kunda; Ekaterina Ivanovna Aksenova; Akhatovna Zigangirova Nailya; Lydia Nikolaevna Kapotina; Stanislava Andreevna Saidakova; Galina Alekseevna Danilina;

Pseudomonas aeruginosa aeruginosa is the most relevant pathogen in cystic fibrosis (CF). The aim of our work was to study the cytotoxicity of P. aeruginosa isolated from Russian patients with CF and to analyze the association of the presence of pseudomonas infection with the clinical parameters of patients and the composition of the microbiota. In a cohort of 751 patients, P. aeruginosa was detected in 45 %. 84 % of isolates with different genotypes of the ExoS type, characterizing the multiplicity and independence of the sources of infection of CF patients. Identification of 7 ExoU isolates, 5 of which (ST235 and ST313) had high cytotoxicity, confirms the risk of infection of CF patients with nosocomial strains. Analysis of the lung microbiome showed that P. aeruginosa is in competition with the main representatives of the «healthy» bacteriome (Actinobacteria, Bacteroidetes, Firmicutes), as well as with mycoplasma and a number of Proteobacteria taxa. At the same time, the presence of P. aeruginosa positively correlates with fungi, enterobacteria, and moraxella. A study of the combination of clinical indicators with the composition of the microbiome confirms the need to develop an antibacterial drug of selective action against microorganisms pathogenic for patients with CF.


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Keywords: Pseudomonas aeruginosa, cytotoxicity, microbiome, actinobacteria, fungi, spirometria

Stavropol State Medical Academy
Pyatigorsk State Research Institute of Balneotherapeutics
Pyatigorsk State Pharmaceutical Academy