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首页> 外文期刊>Journal of Clinical Microbiology >Properties of group B streptococci with protein surface antigens X and R.
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Properties of group B streptococci with protein surface antigens X and R.

机译：具有蛋白质表面抗原X和R的B组链球菌的特性。

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摘要

A total of 128 bovine and 134 human group B streptococci were serotyped by conventional methods. Among the bovine cultures, 60 (47%) had type antigen X, and among the human cultures, 53 (39%) had type antigen R. The occurrence of type antigens X and R was significantly related to the growth pattern of the bacteria in fluid media. Type X- and R-positive cultures and most of the nontypeable cultures predominantly formed long chains and grew as granular sediment with clear supernatant. In addition, group B streptococci with surface antigen X or R showed compact colony formation in soft agar and reacted positively in the salt aggregation test. These properties, possibly caused by the surface charges of the X- and R-positive cultures, might be related to bacterial pathogenicity.
机译：通过常规方法对总共128只牛和134个人类B组链球菌进行血清分型。在牛培养物中，有60种（47％）具有X型抗原，而在人类培养物中，有53种（39％）具有R型抗原。X和R型抗原的出现与细菌的生长模式显着相关。流体介质。 X型和R型阳性培养物和大多数不可分型培养物主要形成长链，并以带有清晰上清液的颗粒状沉积物生长。另外，具有表面抗原X或R的B组链球菌在软琼脂中显示出紧密的菌落形成，并且在盐聚集试验中反应呈阳性。这些特性可能是由X和R阳性培养物的表面电荷引起的，可能与细菌的致病性有关。

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