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Urinary recovery of allantoin in normally fed steers

Published online by Cambridge University Press:  05 November 2021

F. Herrera Gomez ,
F. D. Deb Hovell  and
C. A. Sandoval Castro
F. Herrera Gomez
Affiliation:
Facultad de Medicina Veterinariay Zootecnia-Universidad Autonoma de Yucatan, Apdo. 4-116, Merida, Yucatan, 97100 Mexico. bcasso@tunku.uady.mx.
F. D. Deb Hovell
Affiliation:
Facultad de Medicina Veterinariay Zootecnia-Universidad Autonoma de Yucatan, Apdo. 4-116, Merida, Yucatan, 97100 Mexico. bcasso@tunku.uady.mx. 1Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
C. A. Sandoval Castro
Affiliation:
Facultad de Medicina Veterinariay Zootecnia-Universidad Autonoma de Yucatan, Apdo. 4-116, Merida, Yucatan, 97100 Mexico. bcasso@tunku.uady.mx.
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Extract

Studies in the use of the purine derivatives technique in ruminants have been stimulated by the possible use of this technique as an estimator of the rumen microbial-N supplied to the host animal. The recovery factor influences the estimation of the total purines absorbed and therefore the microbial-N supply. The relationship between exogenous purine input and urinary excretion and recovery has been studied using cattle maintained with the intragastric infusion technique (Orskov et al., 1979). The urinary recovery of exogenous purines has been estimated to be 0.77-0.85 (Chen et al., 1990a, Verbic et al., 1990), and this relationship has been assumed to be applicable to normal feeding situations. To our knowledge there is no data to support or reject this approach. This study examined the urinary recovery of exogenous allantoin input in steers under normal feeding conditions.

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Proceedings of the British Society of Animal Science , Volume 1998 , 1998 , pp. 80
Copyright
Copyright © The British Society of Animal Science 1998

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References

Chen, X. B., Hovell, F. D. DeB., Orskov, E. R. and Brown, D.A. 1990a. Excretion of purine derivatives by ruminants: effect of exogenous nucleic acid supply on purine derivative excretion by sheep. British Journal of Nutrition. 63: 131–142.10.1079/BJN19900098CrossRefGoogle ScholarPubMed
Chen, X. B., Hovell, F. D. DeB., Orskov, E. R. and Brown, D.A. 1990b. Excretion of purine derivatives by ruminants: recycling of allantoin into the rumen via saliva and its fate in the gut. British Journal of Nutrition. 63: 197–205.10.1079/BJN19900107CrossRefGoogle Scholar
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