Microbiological features of the salt lakes of the Kulunda lake system

The object of the study was the water and bottom sediments of the Bolshoye Yarovoye and Burlinskoye salt lakes located in the Kulunda steppe lowland and having recreational value. The aim of this work is to study the antibacterial and anti-candidiasis properties of water and bottom sediments of lakes in the Kulunda lake region in the context of their ecological state. The main factors affecting the basins of lakes B. Yarovoe and Burlinskoe are the intensification of the recreational load due to the development of domestic tourism, the activities of industrial enterprises, and, as a consequence, the washout of pollutants, the extraction and transportation of salt (in Lake Burlinskoe) and the almost complete extraction of silt mud. (in Lake B. Yarovoe), plowing of adjacent territories. No causative agents of infectious diseases were found in the water and bottom sediments, and the total microbial count is about 102 CFU / ml. The predominant group of microorganisms found on agar culture media are non-spore-bearing bacteria. The water of the salty lake B. Yarovoe, filtered from microorganisms, possesses inhibitory properties in relation to all studied 14 gram-positive and gram-negative test strains of microorganisms, and the water of Lake Burlinskoye - in relation to nine strains: gram-negative bacteria Salmonella sonnei 32, Klebsiella pneumonia B-4894, Pseudomonas mirabilis 160205, Serratia marcescens d, Pseudomonas aeruginosa ATCC 9027, Escherichia coli 6645 ATCC 25922, gram-positive bacteria Staphylococcus aureus ATCC 6538, Mycobacterium smegmatis GK and regarding the causative agent of candidiasis Candida albicans 620. It was also shown that pure cultures of spore-forming bacteria isolated from the water and bottom sediments of the studied lakes also have antagonistic activity. The ecological stability of lake ecosystems, in spite of anthropogenic transformation and climatic changes affecting the water and salt regime, is based on biogenic processes that provide resistance to microorganisms introduced from outside, including pathogenic ones, and their elimination.