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Can plant secondary metabolites have a role in controlling gastrointestinal nematode parasitism in small ruminants?

Published online by Cambridge University Press:  27 February 2018

S. Athanasiadou ,
I. Kyriazakis  and
F. Jackson
S. Athanasiadou
Affiliation:
Animal Nutrition and Health Department, Scottish Agricultural College, EH26 0PH, UK
I. Kyriazakis
Affiliation:
Animal Nutrition and Health Department, Scottish Agricultural College, EH26 0PH, UK
F. Jackson
Affiliation:
Parasitology Division, Moredun Research Institute, EH26 0PZ, UK E-mail: s.athanasiadou@ed.sac.ac.uk
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Summary

Plant secondary metabolites (PSM) are widely known for their antinutritional properties; their excessive consumption can detrimentally affect herbivore health and, in some cases, survival. However, a growing body of evidence is suggesting that some classes of PSM may also have some positive effects on herbivores. Such positive effects include the antiparasitic properties of certain PSM and their beneficial consequences on the herbivore's fitness. One of the better-exploited classes of PSM that have been reported with anthelmintic properties is that of the condensed tannins. The consumption of moderate concentrations of condensed tannins has resulted in reduced level of parasitism in sheep and other ruminants. In this paper we discuss the conditions that should be met in order for the positive anthelmintic properties of PSM, and condensed tannins in particular, to be beneficial for parasitised sheep. We also examine whether PSM could have a role in controlling parasitism in ruminants and point out the future research needed to achieve an efficient use of PSM for parasite control.

Resumen

Resumen

Los metabolitos secundarios de plantas (MSP) son ampliamente conocidos por sus propiedades anti-nutricionales; su consumo excesivo puede afectar detrimentalmente la salud y, en algunos casos, la sobrevivencia de herbívoros. Sin embargo, un creciente cuerpo de evidencia está sugiriendo que algunas clases de MSP puede también tener efectos positivos en los herbívoros. Estos efectos positivos incluyen las propiedades antiparasíticas de ciertos MSP y sus consecuencias benéficas sobre la salud de los herbívoros. Una de las clases de MSP mejor explotada que se ha reportado con propiedades antihelmínticas son los taninos condensados. El consumo de concentraciones moderadas de taninos condensados ha resultado en un nivel reducido de parasitismo y en un mejoramiento del desempeño de los herbívoros parasitados. Tomando en consideración los efectos potencialmente positivos (antihelmínticos) y negativos (antinutricionales) de ciertas clases de MSP, en este artículo discutimos las condiciones que deben ser cumplidas para que los herbívoros parasitados se beneficien del consumo de MSP, y de taninos condensados en particular. También examinamos si los MSP pueden tener un papel en el control de parasitismo de rumiantes y sobresaltamos la investigación futura que debe realizarse para alcanzar un uso eficiente de los MSP para el control de parásitos.

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Information
BSAP Occasional Publication , Volume 34: Herbivores: Assessment of intake, digestibility and the roles of secondary compounds , 2006 , pp. 197 - 207
Copyright
Copyright © British Society of Animal Science 2006

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