単一菌種を定着させたgnotobioteマウスにおけるたん白質ならびに脂肪の消化および窒素蓄積について (Germfree,gnotobiotesおよびconventionalマウスにおける飼料の消化・吸収ならびに窒素蓄積に及ぼす消化管内微生物の影響-2,3-〔英文〕)

概要

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The five kinds of bacteria, i. e. Bacteroides sp., Escherichia coli, Lactobaci-llus sp., Staphylococcus epidermidis and Streptococcus faecalis were monocontaminated to germfree (GF) mice at the age of eight weeks, and digestion and absorption of nutrients in diet and nitrogen (N) retention were compared in the same mice before and after contamination. The animals used were both sexes of the ICR strain of GF mice reared in metabolism cage (5 mice per cage) from 7 to 11 weeks of age. The results may be summarized as follows: 1) Body weight, food intake and fresh feces excretion were not influences by bacteria monocontamination (MC). 2) Viable counts of fecal bacteria two weeks after MC were stabilized. 3) Apparent digestibility of crude or true protein and crude fat, generally decreased slightly after MC except in a few examples. 4) N retention increased markedly only after Staphylococcus epidermidis MC among the five kinds of bacteria tested. 5) The protein N ratio in feces tends to increase by MC. As a conclusion, among the five kinds of bacteria Staphylococcus epidermidis has a beneficial effect on utilization of N in the digestive tract of the host mice.
社団法人日本畜産学会の論文