T. G. Nagaraja is a University Distinguished Professor of Microbiology and Dr. Roy Walter Upham Endowed Professor in the Department of Diagnostic Medicine/Pathobiology in the College of Veterinary Medicine at Kansas State University. His research expertise is in gut microbiology of cattle, particularly of beef cattle. His research program, a blend of basic and applied research, has focused primarily on the role of ruminal microbes in function and dysfunctions of the rumen of cattle, and on food borne pathogens, particularly Shiga toxinproducing Escherichia coli and Salmonella in cattle. Specifically, the contributions that he and his associates have made are in the following areas: antibiotics, particularly ionophores, and ruminal fermentation modifications; etiology and pathogenesis of and vaccine development for liver abscesses; causes and preventions of ruminal acidosis and bloat; ecology of Shiga toxinproducing E. coli and Salmonella in cattle; and antimicrobial resistance and antimicrobial alternatives in cattle production systems. He has mentored 22 PhD, 23 MS, and 4 MPH students and several post docs and visiting scientists. His research has resulted in eight US patents. Nagaraja and his associates have published several book chapters (30), review papers (16), and symposia proceedings (5) and peer-reviewed journal papers (270). His teaching responsibilities include Veterinary Bacteriology and Mycology course for the DVM students, Ruminant Digestive Physiology for the DVM students, two graduate courses on the rumen, Rumen Metabolism and Rumen Microbiology.