The textbook presents a set of diagnostic studies in infectious diseases of productive animals. Information about nutrient media for microorganisms, their quality criteria, with the main characteristics of the ingredients are given. The characteristics of the microscope (light, electronic, luminescent), as well as methods of microscopy of microorganisms and methods of experimental infection of laboratory animals for the diagnosis of infectious diseases are given. For students and undergraduates in the specialty “Veterinary medicine”, “Veterinary sanitation” and entering PhD doctoral studies, veterinarians and paramedics, laboratory assistants of veterinary laboratories.
Key words: system, diagnostics, infection, microorganisms, viruses, bacteria, rickettsias, chlamydia, mycoplasmas, prions, fungi, nutrient media, microscope, animals, laboratory, pathology, clinic, epizootics.