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The effects of graded levels of dietary tannin on the epithelial tissue of the gastro-intestinal tract and liver and kidney masses of Boer goats

Published online by Cambridge University Press:  18 August 2016

K. R. Mbatha ,
C. T. Downs  and
I. V. Nsahlai
K. R. Mbatha
Affiliation:
School of Botany and Zoology
C. T. Downs*
Affiliation:
School of Botany and Zoology
I. V. Nsahlai
Affiliation:
School of Agricultural Sciences and Agribusiness, University of Natal, P/Bag X01, Scottsville, 3209, South Africa
*
Corresponding author E-mail: downs@nu.ac.za
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Abstract

This study was conducted to determine the effects of different levels of dietary tannin on gastrointestinal tract (GIT) histology and on liver and kidney masses. Five groups of Boer goats were given diets containing 0, 50, 100, 150 and 200 g/kg of tannin for 6 weeks before data collection. Differences in the histopathology of the oesophagus, reticulum, rumen, omasum, abomasum and duodenum were evaluated. Increased dietary tannin levels induced thickening and/or keratinization of epithelial tissue in the reticulum, rumen, omasum and abomasum. Increased tannin levels also resulted in a loss of epithelial cells, erosion of microvilli and shortened villi height in the duodenum, which could impair the absorption of nutrients. Consequently, condensed tannins had a negative effect on the histopathology of the Boer goats.

Keywords

bacteriadigestive tractgoatshistologytannins
Type
Ruminant nutrition, behaviour and production
Information
Animal Science , Volume 74 , Issue 3 , June 2002 , pp. 579 - 586
Copyright
Copyright © British Society of Animal Science 2002

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