Impact of Tannic Acid on the Gastrointestinal Microflora

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Samanta, S. ; Giri, S. ; Parua, S. ; Nandi, D.K. ; Pati, B.R. ; Mondal, K.C. (2011)
  • Publisher: Microbial Ecology in Health and Disease
  • Journal: Microbial Ecology in Health and Disease (issn: 1651-2235, eissn: 1651-2235)
  • Related identifiers: doi: 10.3402/mehd.v16i1.7946
  • Subject:
    mesheuropmc: macromolecular substances

The cultivable microflora of the intestines in rat have been examined after exogenous administration of tannic acid, a major dietary component found in plant materials. Normal counts of total bacteria, total coliform and Escherichia coli per mg of faeces in experimental rats were 6.1x10<sup>3</sup>, 1.7x10<sup>3</sup> and 1.5x10<sup>3</sup> respectively, present at a ratio of 4:1.1:1. Ingestion of tannic acid (at a dose of 45 mg per 100g of body weight per day) into male albino rats reduced the bacterial population in 6 days and after that their number increased. The body weight of the animals decreased by about 22% after 21 days of tannic acid treatment. The changes in microbial population indicate that tannic acid can impair the ecological balance of gastrointestinal flora.Key words: tannic acid, gastrointestinal flora, total coliform, E. coli .
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