Consists of two parts - general and special. The first outlines the systematics and nomenclature of microorganisms | morphology and ultrastructure of prokaryotes, eukaryotes and viruses | cultivation, metabolism and energy metabolism of bacteria | genetics of microorganisms| mechanisms of antimicrobial action of antibiotics, functioning of the immune system in normal and pathological conditions | immunotherapy, vaccine prophylaxis and all modern immune reactions used in assessing the immune status of a person and diagnosing infectious diseases.The second part describes the biological characteristics of the most significant pathogens of bacterial and viral infections, protozoal invasions and mycoses, modern methods of their laboratory diagnostics. It ends with the topic "Sanitary Microbiology".For students of medical schools and biological departments of universities, biologists, immunologists, microbiologists, epidemiologists and infectious disease specialists.