Dwayne W. Hamar
Associate Professor
Phone: (970) 491-6148
Fax: (970) 491-0259
Email:
Dwayne.Hamar@colostate.edu
Office: 328 Pathology Building
Mailing: 1619 Campus Delivery, Colorado State University, Fort Collins, CO 80523-1619
Degrees
- Ph.D., Biochemistry, University of Nebraska
- M.S., Biochemistry, University of Nebraska
- B.S., Chemistry/Math, Nebraska State College
Research Interests
Dr. Hamar investigates nutritional/metabolic diseases. He studies the role of dietary sulfate in the
development of polioencephalomalacia, including ruminant bacterial sulfate metabolism. He also verifies
trace mineral imbalances in ruminant animals, especially copper deficiency in grazing cattle. He studies
the disease syndrome that may be associated with naturally occurring copper deficiency, and how the
deficiency may be reversed.
He has also been involved in many collaborative studies that involve tissue analysis of various
biochemical parameters that indicate oxidative stress and other metabolic abnormalities associated
with disease.
Selected Publications
Fettman MJ, Valerius KD, Ogilvie GK, Bedwell CL, Richardson KL, Walton JA,
and Hamar DW:Effects of dietary cysteine on blood sulfur
amino acids, glutathione, and malondialdehyde concentrations in cats. Am J Vet Res 60(3):328-333, 1999.
Loneragon GH, Gould DH, Callan RJ, Sigurdson CJ, and Hamar DW: Association of excess
total sulfur intake and an increase in H2S concentrations in the ruminal gas cap in recently weaned beef
calves with polioencephalomalacia. J Am Vet Med Assoc 213:1599-1604, 1998
Fettman MJ, Stanton CA, Banks LL, Johnson DE, Hamar DW, Hegstad RL,
and Johnston S: Effects of weight gain and loss on metabolic rate, glucose tolerance, and serum lipid
in domestic cats. Res Vet Sci 64:11-16, 1998.
Hamar DW, Bedwell CL, Johnson JL, Schultheiss PC, Raisbeck M,
Grotelueschen, DM Williams ES, O'Toole D, Paumer RJ, Vickers MG, and Graham TJ: Iatrogenic copper toxicity
induced by administering copper oxide boluses to neonatal calves. J Vet Diagn Invest 9:441-443, 1997.
Fettman MJ, Stanton CA, Banks LL, Hamar DW, Johnson DE, Hegstad RL,
and Johnston S: Effects of neutering on body weight, metabolic rate, and glucose tolerance in domestic
cats. Res Vet Sci 62:131-136, 1997.
Gould DH, Cummings BA, and Hamar DW: In vivo indicators of
pathologic ruminal sulfide production in steers with diet-induced
polioencephalomalacia. J Vet Diagn Invest 9(1):72-76, 1997.
Hamar DW, Bedwell CL, Johnson JL, Schultheiss PC, Raisbeck M,
Grotelueschen DM, Williams ES, O'Toole D, Paumer RJ, Vickers MG, and
Graham TJ: Iatrogenic copper toxicosis induced by administering copper
oxide boluses to neonatal calves. J Vet Diagn Invest 9:441-443, 1997.
Connally HE, Thrall MA, Forney SD, Grauer GF, and Hamar DW:
Safety and efficacy of 4-methylpyrazole for treatment of suspected or confirmed
ethylene glycol intoxication in dogs: 107 cases (1983-1995). J Am Vet Med Assoc 209(11):1880-1883, 1996.
Mailing Address
Environmental & Radiological Health Sciences
1681 Campus Delivery
Colorado State University
Fort Collins, CO 80523
Phone: (970) 491-7038
Fax: (970) 491-2940
Email:
ERHSDepartment
