Influence of Gastrointestinal Microflora on Digestibility of Nutrients and Biological Value of Protein

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  • 飼料の消化吸収率およびたん白質の生物価に対する消化管内細菌叢の影響
  • シリョウ ノ ショウカ キュウシュウリツ オヨビ タンパクシツ ノ セイ ブッ

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Description

The influence of gastrointestinal microflora on the digestibility of nutrients and biological value of casein of which was contained 8% in the diet, has been investigated in germfree, limited flora and conventionalized adult rats. The obtained results were as follows:<BR>1) The apparent digestibility of crude protein was significantly lower in germfree rat than in limited flora and conventionalized rats, but the its true digestibility did not have any significant difference between limited flora and germfree groups.<BR>2) The apparent digestibility of true protein was significantly different in decreasing order of; germfree>limited flora>conventionalized groups.<BR>3) The digestibility of crude fat was significantly lower in conventionalized rat than in limited flora and germfree groups.<BR>4) The digestibilities of nitrogen free extract and crude fiber did not show any significant difference between conventionalized and limited flora groups. The hair ball found in the stomach of germfree group.<BR>5) On the protein free diet, daily excretion of faecal nitrogen was significantly higher in germfree rat than limited flora and conventionalized groups. And urinary nitrogen excretion in germfree rat was significantly lower than in the other two groups.<BR>6) The biological value of casein was not significantly different each other.<BR>These results show that gastrointestinal microflora affects on the digestibilities of nutrients, but not on biological value of protein in the diet.

Journal

  • Eiyo To Shokuryo

    Eiyo To Shokuryo 30 (3), 141-148, 1977

    JAPAN SOCIETY OF NUTRITION AND FOOD SCIENCE

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