Taxonomy of the Bacteroides I. Deoxyribonucleic Acid Homologies Among Bacteroides fragilis and Other Saccharolytic Bacteroides Species
Taxonomy of the Bacteroides I. Deoxyribonucleic Acid Homologies Among Bacteroides fragilis and Other Saccharolytic Bacteroides Species
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拟杆菌的分类 I. 脆弱拟杆菌和其他糖分解拟杆菌物种之间的脱氧核糖核酸同源性
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发表时间：
1978
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通讯作者：
J. Johnson
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作者：
J. Johnson
通过脱氧核糖核酸同源性分析，确定了“脆弱类杆菌群”和其他糖解肠道类杆菌的菌株。在所研究的340个菌株中，约90%属于以下10个主要同源组中的任何一个：命名种B.Fragilis、B.uggatus、B.disasonis、B.thetaiotaomicron、B.ovatus、B.uniformis和B.eggerthii，一个被描述的组暂时命名为“亚种”。A、“和”3452-A“和”T4-1“。”属于后两个类群的生物与稻瘟病菌有表型相似之处，并且以前没有与稻瘟病菌区分开来。还有30个菌株与上述群体没有同源性，当它们之间进行比较时，表现出非常不同的异质性。在脆性假单胞菌同源群中有两个亚群。这些亚组具有大约65%到70%的组间同源性和大约80%到90%的组内同源性。B.ovatus和B.thetaiotaomicron同源群具有相似的异质性水平，但它们更复杂，因为它们似乎有更多的亚群。其余的同源基团相当均匀，通常具有80%至90%的组内同源性。
Strains of the “Bacteroides fragilis group” and other saccharolytic intestinal bacteroides were delineated by deoxyribonucleic acid homology. Of the 340 strains studied, about 90% belonged to any 1 of 10 major homology groups: The named species B. fragilis, B. vulgatus, B. distasonis, B. thetaiotaomicron, B. ovatus, B. uniformis, and B. eggerthii, a described group temporarily designated “subsp. a,” and groups “3452-A” and “T4-1.” Organisms belonging to the two latter groups had phenotypic similarities with and had not been previously differentiated from B. distasonis. Thirty more strains had no homology with the above-mentioned groups and appeared to be very heterogeneous when compared among themselves. There were two subgroups within the B. fragilis homology group. These subgroups had about 65 to 70% intergroup homology and about 80 to 90% intragroup homology. The B. ovatus and B. thetaiotaomicron homology groups had similar levels of heterogeneity, but they were more complex in that they appeared to have greater numbers of subgroups. The rest of the homology groups were quite homogeneous, usually having 80 to 90% intragroup homology.