Breadcrumb ... Home Faculty and Staff Directory Darrell Johnson Professor Emeritus of Veterinary and Biomedical Sciences Email 605-688-5171 Mailing Address: South Dakota State University Veterinary & Biomedical Sciences SAR 105, Box 2175 Brookings, SD 57007 Office Location: Animal Disease Research and Diagnostic Laboratory Room 105 Back to Directory Associated Areas Department of Veterinary and Biomedical Sciences Animal Disease Research and Diagnostic Laboratory College of Agriculture, Food and Environmental Sciences