Zierdt C H, Hosein I K, Shively R, MacLowry J D
Clinical Pathology Department, National Institutes of Health, Bethesda, Maryland 20892.
J Clin Microbiol. 1992 Jan;30(1):252-4. doi: 10.1128/jcm.30.1.252-254.1992.
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.
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。