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Condensed tannin changes along the digestive tract in lambs fed with sainfoin pellets or hazelnut skins

Quijada, J., Drake, C., Gaudin, E., El-Korso, R., Hoste, H. and Mueller-Harvey, I. (2018) Condensed tannin changes along the digestive tract in lambs fed with sainfoin pellets or hazelnut skins. Journal of Agricultural and Food Chemistry, 66 (9). pp. 2136-2142. ISSN 1520-5118

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To link to this item DOI: 10.1021/acs.jafc.7b05538


The variable anthelmintic efficacy of condensed tannins (CT) against gastrointestinal nematodes may depend on CT concentration, composition, or fate along the digestive tract. We analyzed CT concentration and composition by acetone−HCl−butanol and thiolysis coupled to HPLC-MS in digesta and feces of lambs. Lambs had been infected with Haemonchus contortus and Trichostrongylus colubriformis and received sainfoin pellets and hazelnut skins of contrasting prodelphinidin/procyanidin ratios. The digesta and feces had lower CT concentrations than the original feeds but similar concentration patterns across the digestive compartments. The changes in assayable CT concentrations between rumen, abomasum, and small intestine may be due to complex formation between CT and other dietary components. However, the large CT disappearance (61−85%) from feed to feces could also indicate that CT may have been structurally modified, degraded, or absorbed during digestion. Interestingly, there were no changes in the structural features of assayable CT in the digesta.

Item Type:Article
Divisions:Life Sciences > School of Agriculture, Policy and Development > Department of Animal Sciences > Animal, Dairy and Food Chain Sciences (ADFCS)- DO NOT USE
ID Code:75832
Publisher:American Chemical Society


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