Influence of supplementation with dietary soyabean meal on resistance to haemonchosis in Hampshire down lambs

Wallace, D.S.; Bairden, K.; Duncan, J.L.; Fishwick, G.; Gill, M.; Holmes, Peter; McKellar, Quintin; Murray, M.; Parkins, J.J.; Stear, M. J.

doi:10.1016/0034-5288(95)90108-6

Cited by 60 publications

(33 citation statements)

References 14 publications

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“…The resilience of the lambs to infection was maintained by the protein but not by the energy supplementation (Coop and Kyriazakis 1999). This view has been supported by many studies in sheep such as Abbott et al, (1985Abbott et al, ( , 1986Abbott et al, ( , 1988, Wallace et al, (1995), Datta et al, (1998), Knox andSteel (1999), Bricarello et al, (2005) and Louvandini et al, (2006).…”

Section: Effects Of Dietary Supplementation On Resistance In Sheepsupporting

confidence: 64%

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Effects of dietary protein supplementation and plane of nutrition on the resistance and the resilience of Boer goats against artificial Haemonchus contortus infection under confined conditions

Can¹

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The effects of protein and/ or energy supplementation have been well studied in sheep. However, the few pen studies conducted with goats have failed to identify the role of protein supplementation and combinations with energy supplements against H. contortus infection.The general objective of this thesis was to investigate the effects of protein supplementation and plane of nutrition on resistance and resilience of Boer goats to infection from Haemonchus contortus. To achieve this the first experiment was designed to determine the appropriate amount of additional dietary protein (by having three groups of mature goats effectively fed three different levels of dietary protein) required by nematode free animals given a single relatively high dose of infective H. contortus larvae, to not become infected or at least develop resistance and/or resilience. It was assumed, based on the scientific literature, that a single relatively high dose of infective larvae would elicit strong pathogenic effects where additional dietary protein would give some assistance to the does with their defense to Haemonchus. As often is the case with research on goats the results were not unequivocally clear.Based on these results it was clear that a single dose of infective larvae was insufficient to become established and that these animals had already developed some level of immune response and thus it was assumed, again based on the scientific literature, to elicit strong pathogenic effects the animals tested needed to be younger (more naïve to Haemonchus) and with greater i.e. continued exposure to infective larvae as would happen under grazing conditions (trickle infection) such that different quantities of dietary protein would give these animals different responses to infection by Haemonchus. Again the responses by the goats only indicated subtle differences in immune responses against trickle H. contortus L3 infection. These results, again unexpected, indicated that level of intake (or more specifically plane of nutrition, prior to or during exposure) may be at least as important as protein supplementation in reasonably well fed animals; and or that the method of infection (oral drenching with L3 larvae) was possibly an unreliable method of infection requiring a more consistent method of infection. As such the third experiment involved nematode free mature animals (the only animals available at that time) fed on very different planes of nutrition preceding and during the experiment given relatively high trickle doses of H. contortus larvae via intra-ruminal infection.Overlaid across these experiments were constraints imposed on the amount of infective L3 larvae used to achieve infection; 100 L3 larvae per kg live-weight as a single dose was the maximum initially approved by the University Animal Ethics committee, as they had concerns about animals dying, they also stipulated the use of oral drenching for infective larvae. It was only after these methods failed ii to elicit a strong response was approval given by the Univers...

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Section: Effects Of Dietary Supplementation On Resistance In Sheepsupporting

confidence: 64%

“…Pen studies with sheep have confirmed that dietary protein supplementation can enhance resilience (Wallace et al, 1995; and resistance to GIN infection (van Houtert et al, 1995a). However, pen studies with goats have failed to identify an effect of protein supplementation against GIN infection.…”

Section: Chapter 1: General Introductionmentioning

confidence: 98%

Effects of dietary protein supplementation and plane of nutrition on the resistance and the resilience of Boer goats against artificial Haemonchus contortus infection under confined conditions

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“…contortus e suplementação com uréia não encontraram qualquer diferença entre suplementados e não suplementados. Já em um artigo anterior do mesmo grupo (WALLACE et al, 1995), também com H. contortus, mas desta vez usando a farelo de soja como fonte adicional de proteína, notou-se que os animais suplementados demonstraram menores porcentagens de água e gordura, e maiores porcentagens de proteína e cinzas, cálcio e fósforo em suas carcaças, quando comparados aos mantidos na dieta basal.…”

Section: Ganho De Pesounclassified

“…São inúmeros os trabalhos onde diferenças significativas foram encontradas na comparação do comportamento deste parâmetro na resposta à suplementação (ABBOTT et al, 1985b;KAMBARA et al, 1993;WALLACE et al, 1995;1998;KYRIAZAKIS et al, 1996b;ISRAF et al, 1998). Chama a atenção a consistência desta resposta a despeito da ampla variação nas condições experimentais: espécies animais, espécies de parasitos, teores e fontes protéicas utilizados, entre outros.…”

Section: Proteínas Séricasunclassified

“…É um consenso na literatura, que os teores nutricionais de proteína não afetam o estabelecimento da população de parasitas, e portanto a carga parasitária (ABBOTT et al, 1985a;WALLACE et al, 1995;COOP & HOLMES, 1996;ISRAF et al, 1996;KYRIAZAKIS et al, 1996a;1996b;VAN HOUTERT & SYKES, 1996;WALLACE et al, 1998;ISRAF et al, 1998; Os dados aqui apresentados estão de acordo com tais parâmetros.…”

Section: Aspectos Nutricionaisunclassified

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Estudo da inter-relação parasito hospedeiro em bovinos infectados com Cooperia punctata. Efeito da suplementação protéica sobre as alterações fisiopatológicas em bezerros com infecção única.

Oliveira¹

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The likelihood of detecting differences between groups of sheep following deliberate infection with Ostertagia circumcincta

Stear¹,

Reid²,

Gettinby³

1996

International Journal for Parasitology

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Influence of supplementation with dietary soyabean meal on resistance to haemonchosis in Hampshire down lambs

Cited by 60 publications

References 14 publications

Effects of dietary protein supplementation and plane of nutrition on the resistance and the resilience of Boer goats against artificial Haemonchus contortus infection under confined conditions

Effects of dietary protein supplementation and plane of nutrition on the resistance and the resilience of Boer goats against artificial Haemonchus contortus infection under confined conditions

Estudo da inter-relação parasito hospedeiro em bovinos infectados com Cooperia punctata. Efeito da suplementação protéica sobre as alterações fisiopatológicas em bezerros com infecção única.

The likelihood of detecting differences between groups of sheep following deliberate infection with Ostertagia circumcincta

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