History of medical microbiology. Well-known human pathogens. Mechanisms of pathogenesis of etiological agents. Epidemiology of infectious diseases. Nosocomial and community-acquired infections. Investigation of disease outbreaks. Emerging infectious diseases including zoonoses such as COVID-19, Monkey Pox. One-health concept. Anthropogenic climate change and human diseases. Clinical diagnosis: principles of blood chemistry, urinalysis, hematology and other clinical parameters of disease and health.