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美国医院中噬菌体模式特异性耐苯唑西林和苯唑西林临界耐药金黄色葡萄球菌:流行病学意义

Phage pattern-specific oxacillin-resistant and borderline oxacillin-resistant Staphylococcus aureus in U.S. hospitals: epidemiological significance.

作者信息

Zierdt C H, Hosein I K, Shively R, MacLowry J D

机构信息

Clinical Pathology Department, National Institutes of Health, Bethesda, Maryland 20892.

出版信息

J Clin Microbiol. 1992 Jan;30(1):252-4. doi: 10.1128/jcm.30.1.252-254.1992.

Abstract

For a 13-year period (1978 through 1990), oxacillin-resistant (MIC, greater than 4 micrograms/ml) Staphylococcus aureus (ORSA) strains were collected from Clinical Center (National Institutes of Health) patients and patients from five other U.S. hospitals. From Clinical Center patients, 251 of 253 isolates (99%) were bacteriophage typed as phage group III. Five other hospitals contributed 203 ORSA strains, of which 188 (93%) were group III. The group III ORSA strains predominantly included a characteristic core pattern of phages, 7/47/53/54/75/77. For the low-level (borderline) oxacillin-resistant strains (MIC, 2 to 4 micrograms/ml), amoxicillin-clavulanic acid combination (Augmentin) testing disclosed 62 hyper-beta-lactamase producers, of which 59 (95%) were of a separate, distinct S. aureus strain, with the phage pattern 92/94/96/292/D-11 (group V). Thus, ORSA and hyper-beta-lactamase producing S. aureus are distinct epidemic strains.

摘要

在13年期间(1978年至1990年),从临床中心(美国国立卫生研究院)的患者以及美国其他五家医院的患者中收集了耐苯唑西林(最低抑菌浓度大于4微克/毫升)的金黄色葡萄球菌(ORSA)菌株。在临床中心的患者中,253株分离菌中有251株(99%)被噬菌体分型为III组噬菌体。其他五家医院提供了203株ORSA菌株,其中188株(93%)为III组。III组ORSA菌株主要包括一组特征性的噬菌体核心模式,即7/47/53/54/75/77。对于低水平(临界)耐苯唑西林菌株(最低抑菌浓度为2至4微克/毫升),阿莫西林-克拉维酸联合制剂(奥格门汀)检测发现62株高产β-内酰胺酶菌株,其中59株(95%)属于一个单独的、独特的金黄色葡萄球菌菌株,其噬菌体模式为92/94/96/292/D-11(V组)。因此,ORSA和高产β-内酰胺酶的金黄色葡萄球菌是不同的流行菌株。

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