This course teaches the interactions between the agents of infectious diseases and their hosts. It will provide an overview of the major bacteria, fungi, parasites and viruses that infect animals and give a summary of the diseases that these pathogens cause. It will cover the concept of health, mechanisms of normal and abnormal host defenses, environmental factors that affect the host agent relationship and the methods and procedures used to diagnose and control infectious disease. It is presented through lectures that cover the major bacterial, fungal, parasitic and viral pathogens of animals, and tutorial cases that guide integrated learning of concepts and facts in multiple disciplines. The disciplines that are presented in this course are immunology, epidemiology, microbiology including virology, bacteriology, mycology, parasitology, pathology, clinical pathology, laboratory medicine, and therapeutics. Learning is supported by laboratories, computer modules and group discussions. Students will acquire a competent, integrated understanding of events and interactions that cause infectious disease in individuals and populations; methods and procedures that are used to recognize and diagnose infectious disease; and preventative veterinary medicine including monitoring. The primary focus will be on cattle, horses, sheep, pigs, poultry, dogs, and cats.