Krumholz L R, Bryant M P, Brulla W J, Vicini J L, Clark J H, Stahl D A
Department of Animal Sciences, Univeristy of Illinois, Urbana.
Int J Syst Bacteriol. 1993 Apr;43(2):293-6. doi: 10.1099/00207713-43-2-293.
Quin's oval is a relatively large bacterium often seen in the rumens of sheep fed diets containing some readily fermented carbohydrates. It has not been obtained in axenic cultures, but a number of its features have been determined by various methods, such as studying cell suspensions purified from rumen fluid by differential centrifugation. We obtained similarly purified suspensions from a sheep fed a diet containing a large amount of molasses. Nearly complete 16S rRNA sequence analysis of these cells as well as cells as Selenomonas ruminantium subsp. ruminantium GA192 (ATCC 12561; type strain) and S. ruminantium subsp. lactilytica HD4 (ATCC 27209) was done. These sequences were compared with those of other bacteria. Evolutionary distance estimates indicated that Quin's oval was most closely related to the Selenomonas-Megasphaera-Sporomusa group in the gram-positive phylum but that it belongs in a new genus. We propose the name Quinella ovalis gen. nov., sp. nov., with its description based on previously known features.
奎因氏椭圆形菌是一种相对较大的细菌，常见于喂食含有一些易发酵碳水化合物日粮的绵羊瘤胃中。它尚未在无菌培养物中获得，但通过各种方法已确定了它的一些特征，例如研究通过差速离心从瘤胃液中纯化得到的细胞悬液。我们从一只喂食大量糖蜜日粮的绵羊身上获得了类似纯化的悬液。对这些细胞以及反刍月形单胞菌反刍亚种GA192（ATCC 12561；模式菌株）和反刍月形单胞菌乳酸亚种HD4（ATCC 27209）的细胞进行了近乎完整的16S rRNA序列分析。将这些序列与其他细菌的序列进行了比较。进化距离估计表明，奎因氏椭圆形菌与革兰氏阳性菌门中的月形单胞菌-巨球形菌-芽孢八叠球菌属关系最为密切，但它属于一个新属。我们提出新属名奎因氏菌属（Quinella），新种名卵形奎因氏菌（Quinella ovalis），并根据先前已知的特征对其进行描述。
