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Dwayne W. Hamar

Dwayne W. Hamar
Associate Professor

Phone: (970) 297-5122
Fax: (970) 297-0320
Email: Dwayne.Hamar@colostate.edu
Office: Veterinary Diagnostic Laboratory
Mailing: 300 West Drake
1644 Campus Delivery
Colorado State University
Fort Collins, CO 80523-1644

 

Degrees

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
EH Building - 1681 Campus Delivery
MRB Building - 1618 Campus Delivery
Colorado State University
Fort Collins, CO 80523

EH Building Phone: (970) 491-7038
Fax: (970) 491-2940

MRB Building Phone: (970) 491-5222
Fax: (970) 491-0623
Email: ERHSDepartment