Dr. Trevor Smith


Professor | Animal & Poultry Science

 

Dr. Trevor Smith

Email: tsmith@uoguelph.ca

Extension: 53746


RESEARCH INTERESTS:

Characterization and dietary treatment of Fusarium mycotoxicoses in poultry and swine. Experiments have been conducted to determine the effects of feeding grains naturally-contaminated with Fusarium mycotoxins on growth performance of broiler chickens, turkey poults and starter swine. Fusaric acid has been identified as an important factor in Fusarium mycotoxicoses. A toxicological synergism has been demonstrated between fusaric acid and deoxynivalenol (vomitoxin). Dietary treatments have been identified that allow the feeding of contaminated grains with minimal effects on animal performance. The growth promoting potential of biogenic amines in poultry and swine. It has been demonstrated that the mammalian polyamines (putrescine, spermidine and spermine) have the potential to promote growth and performance through precocious development of the intestinal tract. Dietary supplements of putrescine have been shown to promote the growth of broiler chickens, leghorn chicks and turkey poults. Chicks can be fed diets containing raw soybeans with no growth depression if supplemental putrescine is fed. Laying hens fed supplemental dietary putrescine have thicker eggshells and reduced eggshell deformations. Supplemental dietary spermine has been shown to promote the growth of shrimp. Feed-borne biogenic amines were previously considered only to be toxicants. Some of these compounds are now recognized as having growth promoting properties.


GRADUATE STUDENTS:

  • 2005: G. Girgis, Ph.D., "Study the effect of Fusarium mycotoxins on immunity of broiler breeder chickens."

PUBLICATIONS:

Papers in Refereed Journals:

Chowdhury, S.R., Sarker, D.K., Chowdhury, S.D., Smith, T.K., Roy, P.K. and Wahid, M.A. 2005. Effects of dietary tamarind on cholesterol metabolism in laying hens. Poult. Sci. 84: 56-60.

 

Chowdhury, S.R. and Smith, T.K. 2004. Effects of feeding blends of grains naturally contaminated with Fusarium mycotoxins on performance and metabolism of laying hens. Poult. Sci. 83: 1849-1856.

 

Swamy, H.V.L.N., Smith, T.K. and MacDonald, E.J. 2004. Effects of feeding blends of grains naturally contaminated with Fusarium mycotoxins on brain regional neurochemistry of starter pigs and broiler chickens. J. Anim. Sci. 82: 2131-2139.

 

Swamy, H.V.L.N., Smith, T.K., Karrow, N.A. and Boermans, H.J. 2004. Effects of feeding blends of grains naturally contaminated with Fusarium mycotoxins on growth and immunological parameters of broiler chickens. Poult. Sci. 83: 533-543.

 

Raymond, S.L., Smith, T.K. and Swamy, H.V.L.N. 2003. Effects of feeding a blend of grains naturally contaminated with Fusarium mycotoxins on feed intake, serum chemistry, and hematology of horses, and the efficacy of a polymeric glucomannan mycotoxin adsorbent. 2003. J. Anim. Sci. 81: 2123-2130.

 

Swamy, H.V.L.N., Smith, T.K., MacDonald, E.J., Karrow, N.A., Woodward, B. and Boermans, H.J. 2003. Effects of feeding a blend of grains naturally contaminated with Fusarium mycotoxins on growth and immunological measurements of starter pigs, and the efficacy of a polymeric glucomannan mycotoxin adsorbent. J. Anim. Sci. 81: 2792-2803.

 

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