Immunologic Concepts Relating to the Bovine Respiratory System

Abstract

The science of immunology has moved from the area of serology to the study of cells and antibodies within the animal during the last 15 years. Information gleaned from studies during this period has provided us with a better basis for understanding the reason for bacterial and viral diseases. A summary of some of these advances and an indication of where this knowledge has assisted us in gaining a better understanding of defense against disease processes will be reviewed. Consideration of the antigens associated with the microorganisms, the organs and cells involved in the immune responses and means of resistance or interaction within the host resulting in disease will be discussed.