大鼠胃肠道中的纤维素分解菌和非纤维素分解菌。
Cellulolytic and non-cellulolytic bacteria in rat gastrointestinal tracts.
作者信息
Macy J M, Farrand J R, Montgomery L
出版信息
Appl Environ Microbiol. 1982 Dec;44(6):1428-34. doi: 10.1128/aem.44.6.1428-1434.1982.
Abstract
Lactobacillus and Bifidobacterium species were the predominant organisms isolated from small intestinal (jejunal) contents of rats, and lactic acid was the only organic acid detected. The numbers of cellulolytic bacteria in small intestines were low (approximately 10(3)/g). The fermentation in ceca was different from that in intestines, as, in addition to small amounts of lactic acid, high concentrations of volatile fatty acids were detected. The mixed cecal microflora was able to digest cellulose (pebble-milled Whatman no. 1) and cabbage. High numbers of cellulolytic bacteria were found (0.5 X 10(8) to 12.2 X 10(8)/g; 6% of total viable bacteria). The predominant celluloytic organism isolated was Bacteroides succinogenes. Ruminococcus flavifaciens was isolated from a few animals. The kinds and numbers of the predominant non-cellulolytic organisms isolated from rat ceca were similar to those described by previous workers.
摘要
从大鼠小肠（空肠）内容物中分离出的主要微生物是乳酸杆菌属和双歧杆菌属，并且检测到的唯一有机酸是乳酸。小肠中纤维素分解菌的数量较少（约10³/g）。盲肠中的发酵与肠道中的不同，除了少量乳酸外，还检测到高浓度的挥发性脂肪酸。盲肠混合微生物群能够消化纤维素（经球磨的沃特曼1号滤纸）和卷心菜。发现了大量的纤维素分解菌（0.5×10⁸至12.2×10⁸/g；占总活菌数的6%）。分离出的主要纤维素分解微生物是产琥珀酸拟杆菌。从少数动物中分离出了黄化瘤胃球菌。从大鼠盲肠中分离出的主要非纤维素分解微生物的种类和数量与先前研究人员描述的相似。
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