Funding: all study expenses were covered by the funds allocated for the State Assignment on the Development of a personalized approach to the therapy of infections using virulent bacteriophages (Code: Bacteriophage).

Author contribution: Gorodnichev RB — planned the study, conducted the experiments, and wrote the manuscript; Kornienko MA, Letarov AV, Shitikov EA — planned the study, analyzed its results, and wrote the manuscript; Kuptsov NS, Efimov AD, Bogdan VI — conducted the experiments; Ilina EN — planned the study and wrote the manuscript.

Compliance with ethical standards: the experiments were conducted in full compliance with Biosafety Guidelines for working with risk group III–IV pathogens (SP 1.3.2322-08), Amendment 1 to Biosafety Guidelines for working with risk group III–IV pathogens (SP 1.3.2518-09), medical waste regulations (SanPin 2.1.7.279010), and Federal Clinical Guidelines on the rational use of bacteriophages for therapy and prevention of diseases.