[Some aspects of antibiotic resistance of oligotrophic bacteria]

Antibiotic resistance spectra of a large group of oligotrophic and eutrophic bacteria from the open soil and aquatic ecosystems were studied. It was shown that sometimes antibiotic resistance of the oligotrophs was of plasmid nature. A possible transfer of plasmid antibiotic resistance from oligotrophs to pathogenic eutrophic soil and aquatic bacteria in the natural ecosystems is discussed. It was demonstrated that there was no insurmountable transcription/translation barriers between oligotrophic and eutrophic bacteria though the two bacterial groups are taxonomically and evolutionally very distant. A hypothesis was proposed that oligotrophic bacteria are likely to be one of the possible pools of plasmid antibiotic resistance for pathogenic microbes. Plasmid-free strains of some oligotrophic bacteria were selected. With the method of antibioticograms, taxonomic patterns for oligotrophic bacteria of the central group were developed.