摘要 : We provide results of research on the biodiversity and distribution of Enterobacteriacae and a non-fermenting group of bacteria in Lake Baikal that belong to potentially pathogenic bacteria (PPB). They were found for the first tim... 展开 We provide results of research on the biodiversity and distribution of Enterobacteriacae and a non-fermenting group of bacteria in Lake Baikal that belong to potentially pathogenic bacteria (PPB). They were found for the first time mainly in the littoral parts of the lake and none were identified from the pelagic zone. Thirty-one species of bacteria were isolated, which were representatives of 14 genera. Our results show that bacteria of Acinetobacter, Pseudomonas, Citrobacter, and Enterobacter genera are those most often found in littoral zones. Most common as percentages of all heterotrophic microorganisms found were: Acinetobacter calcoaceticum var. Joffi (7.7%), Pseudomonas aeruginosa (6.3%), Alcaligenes spp. (3.5%), and Escherichia coli (3.2%). Although water analyses in the Lake Baikal littoral zone show the presence of these bacteria, it should be noted their number is small compared to the total abundance and diversity of the lake microbiocenosis. Growth of the species diversity and abundance of these bacterial groups correlate with anthropogenic load. Therefore, one may suggest them as an indicative group of bacteria in ecological monitoring. 收起