[Scientific substantiation of perfection of sanitary bacteriological monitoring in drinking water use].

Criterion of the epidemic safety of drinking water is the absence of pathogenic and potentially pathogenic microorganisms. Currently, water quality control is performed in terms of the index of total coliform bacteria (TCB). TCB index oriented to the labile lactose sign has not sufficient relevance in the determination of the degree of the epidemic danger in the water use in relation to Salmonella and potentially pathogenic microorganisms.

[The value of glucose-positive coliform bacteria and potentially pathogenic bacteria as indicators of epidemiological safety of tap water].

Due to intensive anthropogenic pollution of water environment generally accepted indicators of epidemic security of water bodies - common bacteria and thermotolerant coliform bacteria do not always permit to obtain an objective characterization of bacterial contamination of tap water. From the point of view of authors the integral index - glucose positive coliform bacteria most adequately reflect the sanitary-hygienic and epidemiological situation of water bodies. In monitoring for bacterial quality of tap water it is advisable to determine glucose positive coliform bacteria, that will provide the relevance of estimation of the epidemiological safety of water use.

[New methodological approaches to the detection and quantitative registration of Salmonella in the study of water objects].

The paper gives data on the use of techniques to detect and register Salmonella in the water objects, by applying a new liquid nutrient medium. Experimental and field studies have shown its advantage over the accumulation media widely used in practical healthcare. It has been ascertained that the nutrient medium not only accumulates biomass, but also provides the restoration of the biological properties of uncultivated Salmonella species.

[Monitoring of bacterial contamination of water reservoirs in the Rostov region].

The paper estimates the epidemic value of indicators for microbial contamination of waters from their main supply sources (waters from the Tsimlyansk Reservoir and the Nizhni Don River and drinking waters from the towns of Azov and Tsimlyansk) in the Rostov Region. The Tsimlyansk Reservoir water met the SanPiN 2.1.

[Significance of indicator microorganisms in the assessment of a microbial risk in the occurrence of epidemic hazard in drinking water use].

Summary. The paper provides comparative characteristics of water quality in the assessment of a risk for intestinal infections in drinking water use. It has shown that of the greatest predictive value is direct detection of potentially pathogenic microorganisms, as well as the integral indicator determined by glucose fermentation, such as glucose-positive coliform bacteria.