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Basal urinary excretion of purine derivatives in sheep

Published online by Cambridge University Press:  24 November 2017

J. Balcells ,
J.A. Guada ,
C. Castrillo  and
J.I. Bonafonte
J. Balcells
Affiliation:
Departamento de Producción Animal y Ciencia de los Alimentos
J.A. Guada
Affiliation:
Departamento de Producción Animal y Ciencia de los Alimentos
C. Castrillo
Affiliation:
Departamento de Producción Animal y Ciencia de los Alimentos
J.I. Bonafonte
Affiliation:
Departamento de Producción Animal y Ciencia de los Alimentos Departamento de Patologia Animal, Facultad de Veterinaria, Miguel Servet 177, 50013 Zaragoza, Spain
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Extract

In ruminants duodenal purines,mainly derived from microbial nucleic acids, are catabolised and excreted in the urine as xanthine, hypoxanthine, uric acid and allantoin. The use of purine derivatives as an index of net microbial syntesis in the rumen requires a better understanding of the contribution of endogenus losses to total urinary excretion.

Similar levels of basal excretion of purine derivatives has been determined in ruminants maintained by intragastric nutrition (Giesecke et al. 1984, Fujihara et al. 1987) and preruminants fed on liquid diets (Linberg, 1989). However, lower excretion of allantoin and uric acid were recorded when exogenous supply was reduced by fasting (Rys et al. 1975).

Type
Ruminant Nutrition
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1990 , March 1990 , pp. 109
Copyright
Copyright © The British Society of Animal Production 1990

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References

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