Disturbances in the composition of microbiocenoses are warnings of changes in the physiological status of the organism, associated with the inhibition of immunobiological protection of the organism, its allergization, chronic intoxication, and increased susceptibility to infectious diseases. Some studies confirm the effect of magnetic radiation on abnormal characteristics both on the viability and growth rate of bacteria, and on the activity of various systems, in particular the antioxidant system and the lipid peroxidation system.