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首页> 美国卫生研究院文献>Journal of Clinical Microbiology >Improved recovery of group A beta-hemolytic streptococci with a new selective medium.
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Improved recovery of group A beta-hemolytic streptococci with a new selective medium.

机译：使用新的选择性培养基提高了A组溶血性链球菌的回收率。

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摘要

A new selective group A streptococcus agar (ssA) (BBL Microbiology Systems, Cockeysville, Md.) was evaluated for the recovery and direct plate identification of group A beta-hemolytic streptococci (GABHS) in comparison with sheep blood agar (SBA). A total of 265 GABHS were recovered from 1,116 throat swab specimens on both media, with detection rates of 98.9 and 91.7% for ssA and SBA, respectively. Primary bacitracin disk susceptibility tests were performed on 549 specimens, and presumptive identifications were possible for 81.4% of the GABHS on ssA, as compared with 44.2% on SBA. All of the 120 GABHS recovered from another 567 specimens were identified by a coagglutination method after overnight incubation on ssA, whereas only 70.2% were identified at this interval on SBA. The major advantage of the ssA was the inhibition of normal respiratory flora, permitting improved recovery and rapid identification of GABHS.
机译：与绵羊血琼脂（SBA）相比，评估了一种新的选择性A组链球菌琼脂（ssA）（BBL Microbiology Systems，Cockeysville，MD）的回收率和直接板鉴定A组β-溶血链球菌（GABHS）的能力。在两种培养基上，共从1116个咽拭子样本中回收到265种GABHS，ssA和SBA的检出率分别为98.9和91.7％。在549个标本上进行了杆菌肽敏感性试验，推测可能有ssA的GABHS占81.4％，而SBA占44.2％。在ssA上过夜孵育后，通过凝集法鉴定了从另外567个标本中回收的所有120种GABHS，而在SBA上此时间间隔仅鉴定出70.2％。 ssA的主要优点是抑制了正常的呼吸道菌群，从而提高了恢复能力并能快速鉴定GABHS。

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