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Heterogeneity of microbial communities of surface waters on indices of antibiotic resistance of bacteria


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Microorganisms isolated from reservoirs within urbanized areas, have acquired multiple antibiotic resistance, in this connection during the microbiological monitoring of water objects as an additional criterion of anthropogenic pollution it is worth to take into account indices of antibiotic resistance of bacteria. The study of heterogeneity of microbial communities of largest reservoirs in Eastern Siberia (Angara River and Lena) in terms of antibiotic resistance bacteria was performed from the positions of cluster structuredness. Opportunistic gram-negative bacteria and allochthonous representatives of microbiocenoses of the water bodies were established to be characterized by belonging to four clusters (antibiotic sensitive, mono-, moderately - and poly-antibiotic resistant). At the same time the proportion of microorganisms belonging to different clusters, vary significantly both in terms of different water bodies, and in separate parts of the same body of water, being largely dependent on anthropogenic load on water. Thus, the heterogeneity of the microbial populations permits to present comparative quantitative assessment of reservoirs, as well as their portions, in terms of antibiotic resistance of microorganisms. The increment in the proportion of resistant strains reflects the sanitary and epidemiological importance of this property, because provides evidence of the contamination of water supplies by household sewage.

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ISSN: 0016-9900 (Print)
ISSN: (Online)