Dwight C Hirsh

Dwight C. Hirsh, DVM, PhD, is emeritus professor, Department of Pathology, Microbiology and Immunology, University of California-Davis. N. James MacLachlan, DVM, PhD, is professor, Department of Pathology, Microbiology and Immunology, University of California-Davis. Richard L. Walker, DVM, PhD, is professor of clinical diagnostic bacteriology, California Animal Health and Food Safety Laboratory, University of California-Davis