Training Manual . - Ulyanovsk . : UGSHA, 1998. - 51 s. Reviewer d. in. n. Professor B. G. Orlyankin (VIEV). This textbook covers the most used definitions and categories that form the basis of the conceptual apparatus of general epizootology and infectology. The given interpretations are based on modern representations and achievements of domestic and foreign science. The textbook was prepared by the Department of Veterinary Pathology of RUDN University and the Department of Microbiology, Virology, Epizootology and All-Ukrainian Society of Veterinary Medicine on the basis of an epizootology and infectious diseases course read for students of the specialty of veterinary medicine .