The effect of the quality of roughage on the course of Trypanosoma vivax infection in West African Dwarf goats:

Dam, J.T.P. van; Heide, D. van der; Ingh, T.S.G.A.M. van den; Wensing, Th.; Zwart, D.

doi:10.1016/s0301-6226(97)00127-9

Cited by 6 publications

(1 citation statement)

References 19 publications

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“…The present finding does, therefore, not support the hypothesis that protein supplementation can lower the extent of anorexia in a manner similar to its effect on PPRI. In the only other study that investigated effects of food quality on anorexia, the degree of anorexia following trypanosome infection was also similar in goats that received either a high- or a low-protein food ( 44 ) . We conclude that protein supplementation affected PPRI as measured by FEC but not anorexia and that the latter two variables are, therefore, not strongly related.…”

Section: Discussionmentioning

confidence: 97%

Consequences of protein supplementation for anorexia, expression of immunity and plasma leptin concentrations in parasitized ewes of two breeds

Zaralis¹,

Tolkamp²,

Houdijk³

et al. 2008

Br J Nutr

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The periparturient relaxation of immunity (PPRI) against parasites in ewes has a nutritional basis. We investigated whether ewes experience a reduction in food intake (anorexia) during PPRI and if the magnitude of anorexia is affected by host production potential and dietary protein supplementation. We also investigated whether nematode infection is linked to plasma leptin concentrations in periparturient ewes. The experiment was a 2 £ 2 £ 2 factorial design. Two breeds of twin-bearing/lactating ewes (Greyface cross, G (n 32) and Scottish Blackface, B (n 32)) were used. Half of the ewes were trickle infected with 30 000 larvae of the abomasal parasite Teladorsagia circumcincta per week and the other half were not. During the experiment, all ewes had ad libitum access to a low-protein diet that provided less protein than the recommended allowance. In addition, half of the ewes received a protein supplement that resulted in protein intakes that exceeded recommendations. Nematode infection resulted in a breakdown of immunity to parasites and a reduction in food intake in both breeds. The breeds differed in the extent of PPRI (G ewes having higher faecal egg counts than B ewes), but not in the magnitude of anorexia. Protein supplementation resulted in a reduction in faecal egg counts, but had no effect on the magnitude of anorexia. Plasma leptin concentrations changed significantly over time, but were not affected by protein supplementation or infection. It is concluded that infection with T. circumcincta in periparturient ewes results in anorexia that is not alleviated by protein supplementation and seems unrelated to plasma leptin concentrations.

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Section: Discussionmentioning

confidence: 97%