DVM, Colorado State University, 1993
MS, Agriculture Economics, Colorado State University, 1998
PhD, Clinical Sciences-Epidemiology, Colorado State University, 2008
Courses as Primary Instructor
VDPAM 436D - Beef Records Analysis: Feedlot Production Medicine
VDPAM 463X - Feedlot Production Medicine
Courses as Guest Lecture
VDPAM 309 - Introduction to Production Animal Informatics
VDPAM 465X - Animal Welfare Clinical Rotation
VDPAM 481 - Advanced Cow/Calf Production Medicine
VDPAM 482 - Applied Beef Production Medicine Preceptorship
VDPAM 487 - Livestock Disease Prevention
AN S 426 - Beef Cattle Systems Management
Research program is targeted at applied beef cattle production medicine. Interested in pre-harvest food safety, infectious reproductive diseases, bovine respiratory disease and animal welfare and handling.
Iowa State University Extension and Outreach Award for Excellence in Research-Based Programming
Academy of Veterinary Consultants:
AV/Tech Program Sub-committee
American Association of Bovine Practitioners:
Student Activities Committee
American Veterinary Medical Association (1993-present)
Iowa Veterinary Medical Association (2008-present):
Board of Directors
Derscheid RJ, Dewell RD, Dewell GA, Kleinhenz K, Shearer L, Gilliam J, Reynolds J, Sun Y, Shearer JK. 2016. Validation of a Portable Pneumatic Captive-Bolt Device as a Single-Step Method of Euthanasia for Use in Mass Depopulation of Feedlot Cattle. Journal of the American Veterinary Medical Association 248(1):96-104.
Dewell RD, Moran LE, Kleinhenz KE, Derscheid RJ, Dewell GA, Shearer LC, Shearer JK. 2015. Assessment and comparison of electrocardiographic and clinical cardiac evidence of death following use of a penetrating captive bolt in bovines. The Bovine Practitioner 49(1):32-36.
Hanthorn CJ, Dewell GA, Dewell RD, Cooper VL, Wang C, Plummer PJ, Lakritz J. 2014. Serum concentrations of haptoglobin and haptoglobin-matrix metalloproteinase 9 (Hp-MMP 9) complexes of bovine calves in a bacterial respiratory challenge model. BMC Veterinary Research 10:285.
Hanthorn CJ, Dewell RD, Cooper VL, Frana TS, Plummer PJ, Wang C, Dewell GA. 2014. Randomized clinical trial to evaluate the pathogenicity of Biberstenia trehalosi in respiratory disease among calves. BMC Veterinary Research 10:89
Cho YI, Sun D, Cooper V, Dewell G, Schwartz K, Yoon KJ. 2012. Evaluation of a commercial rapid test kit for detecting bovine enteric pathogens in feces. Journal Veterinary Diagnostic Investigation 24(3):559-562.
Morley, PS, DA Dargatz, DR Hyatt, GA Dewell, JG Patterson, BA Burgess and TE Wittum. 2011. Effects of restricted antimicrobial exposure on antimicrobial resistance in fecal Escherichia coli from feedlot cattle. Foodborne Pathogens and Disease 8(1):87-98.
Villarroel A, SR McDonald, WL Walker, L Kaiser, RD Dewell, GA Dewell. 2010 A survey of reasons why veterinarians leave rural veterinary practice in the United States. Journal of the American Veterinary Medical Association, 236(8):859-867.
Villarroel A, SR McDonald, WL Walker, L Kaiser, RD Dewell, GA Dewell. 2010 A survey of reasons why veterinarians enter rural veterinary practice in the United States. Journal of the American Veterinary Medical Association, 236(8):849-857.