The contents of this book, in line with Ethiopian Occupational Standard, cover the application of knowledge, skill and attitude required for animal health services. This book includes nine modules: biological etiologies of animal diseases, identifying pathological lesions of animal diseases, carrying out clinical diagnostic procedures, understanding immunity and immunization, performing animal diseases control and prevention operations, identifying and handling infectious animal diseases, identifying and handling parasitic animal diseases, identifying and handling non-infectious animal diseases, and identifying and handling work place hazards and risks.