Hulay A. Ecological relationships of Erysipelothrix rhusiopathiae bacteria in freshwater biocenoses

The thesis presents the results of studying ecological relationships of Erysipelothrix rhusiopathiae bacteria in freshwater biocenoses. It has been established that E. rhusiopathiae species has high environmental tolerance to abiotic factors in an aquatic environment. It has been proved that the secretions of freshwater algae, plants and their decomposition products have a pronounced allelopathic effect on E. rhusiopathiae, changing the bacteria number in the environment significantly. Previously unknown species of potential nourishers of E. Rhusiopathiae, such as protists, rotifers, annelid worms, crustaceans, mollusks, larvae and adult insects, have been discovered among the inhabitants of reservoirs. Model experiments have revealed the ability of E. rhusiopathiae to migrate across the trophic chains of water reservoirs, involving aquatic organisms of various organization levels, namely protists, crustaceans, mollusks, annelid worms, insects, fish, and reptiles. It has been found that stable existence of the natural foci of water-related erysipelas is based on the high adaptive capacity and a wide range of ecological relationships of E. rhusiopathiae in freshwater biocenoses.