The ecology of the streptococci
The ecology of the streptococci
复制标题
链球菌的生态学
DOI：
10.1007/bf02010675
复制
发表时间：
1982
影响因子：
3.6
通讯作者：
J. Mundt
中科院分区：
文献类型：
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作者：
J. Mundt
所有的链球菌都可以根据它们所占据的生态环境而分成几类。乳酸组的成员只存在于植物环境和乳制品中。化脓组的成员和亚嗜热组的口腔和肠道居民被发现只与恒温宿主密切相关。化脓性链球菌属（Streptococcus pyogenes）、S. equi和S.罕见的，仅限于单一的主机-人，马，猪，而其他人，如S。在几种宿主中可以发现无乳。亚嗜热群的肠道寄生菌S.牛至S.马，发生在几个动物物种，并没有从其他来源隔离。表面上看，“肠道”类的粪便实际上可能包括一个特别限于人类宿主的类，以及分布在野生动物、昆虫和植物中的第二类。后一组与人类类型的不同在于能够水解淀粉并在牛奶中产生凝乳酶蛋白水解类型的凝乳。屎链球菌广泛分布于恒温和变温环境中，但不知道区分来源的特性。屎链球菌. casseliflavus仅从昆虫和植物中分离出来。来自所有环境的未鉴定链球菌在性质上差异很大。很多斗争。lactis、乳链藻S. faecalis和S.屎室
All species of streptococci are divided into several groups according to the ecological niches they occupy. Members of the lactic acid group are found only in the plant environment and the dairy. Members of the pyogenic group and the buccal and intestinal residents of the subthermophilic group are found in intimate association only with homeothermic hosts. Members of the virulent pyogenic group, such asStreptococcus pyogenes, S. equi, andS. infrequens, are restricted to single hosts—the human, the horse, and the pig—whereas others, such asS. agalactiaecan be found in several hosts. The intestinal dwellers of the subthermophilic group,S. bovisandS. equinus, occur in several animal species and are not isolated from other sources. The superficially homogeneousS. faecalisof the “enteric” group may actually consist of a group specifically restricted to the human host, and of a second group distributed among wild animals, insects, and plants. The latter group differs from the human type by the ability to hydrolyze starch and to produce a rennin-proteolytic type of curd in milk.Streptococcus faeciumis widely distributed in both the homeothermic and poikilothermic environments, but no properties which differentiate the sources are known.Streptococcus faeciumbiot.casseliflavushas been isolated only from insects and plants.Streptococcus uberisoccurs on the bovine lips and skin. Unidentified streptococci from all environments vary widely in properties. Many resembleS. lactis, S. faecalis, andS. faecium.
Azuma T.：“Ca2 饱和 EDTA (Ca-EDTA) 对成熟培养过程中生发囊阶段的猪、牛和小鼠卵母细胞的影响，以及 Zn2 螯合参与 Ca-EDTA 诱导原核形成”再现。
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