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C57BL小鼠粪便内毒素与粪便微生物群之间的关系。

The relationship between faecal endotoxin and faecal microflora of the C57BL mouse.

作者信息

Rogers M J, Moore R, Cohen J

出版信息

J Hyg (Lond). 1985 Oct;95(2):397-402. doi: 10.1017/s0022172400062823.

Abstract

We studied the effect of oral selective antibiotic decontamination (SD) on the faecal endotoxin content and microflora in individual C57BL mice. Suppression of the coliform count was associated with an initial rise in faecal endotoxin concentration from 0.1 to 3.1 mg/g wet faeces during the first week of SD, which fell to 0.04 mg/g during the second week of treatment. Cessation of SD resulted in an immediate sharp increase in coliform count followed by its decline and gradual recovery to pre-treatment counts. Faecal endotoxin levels followed a parallel course. SD did not effect significantly the counts of lactobacilli, bacteroides and enterococci. It appears that the coliform population is responsible for the overall level of faecal endotoxin, and that during the initial period of SD endotoxin levels are elevated, an effect which may be mediated by antibiotic-enhanced release of endotoxin.

摘要

我们研究了口服选择性抗生素去污(SD)对个体C57BL小鼠粪便内毒素含量和微生物群落的影响。在SD的第一周,大肠菌计数的抑制与粪便内毒素浓度从0.1毫克/克湿粪便初始升高至3.1毫克/克有关,而在治疗的第二周降至0.04毫克/克。停止SD导致大肠菌计数立即急剧增加,随后下降并逐渐恢复到治疗前的计数。粪便内毒素水平呈现平行变化。SD对乳酸杆菌、拟杆菌和肠球菌的计数没有显著影响。看来大肠菌群决定了粪便内毒素的总体水平,并且在SD的初始阶段内毒素水平升高,这种效应可能是由抗生素增强的内毒素释放介导的。

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