Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA.
J Clin Microbiol. 2012 May;50(5):1518-23. doi: 10.1128/JCM.06439-11. Epub 2012 Feb 15.
Identification of Corynebacterium species may be challenging. Corynebacterium species are occasional causes of prosthetic joint infection (PJI), but few data are available on the subject. Based on the literature, C. amycolatum, C. aurimucosum, C. jeikeium, and C. striatum are the most common Corynebacterium species that cause PJI. We designed a rapid PCR assay to detect the most common human Corynebacterium species, with a specific focus on PJI. A polyphosphate kinase gene identified using whole-genome sequence was targeted. The assay differentiates the antibiotic-resistant species C. jeikeium and C. urealyticum from other species in a single assay. The assay was applied to a collection of human Corynebacterium isolates from multiple clinical sources, and clinically relevant species were detected. The assay was then tested on Corynebacterium isolates specifically associated with PJI; all were detected. We also describe the first case of C. simulans PJI.
鉴定棒状杆菌属可能具有挑战性。棒状杆菌属偶尔会引起人工关节感染(PJI),但关于这方面的资料很少。根据文献,导致 PJI 的最常见棒状杆菌属包括 Corynebacterium amycolatum、Corynebacterium aurimucosum、Corynebacterium jeikeium 和 Corynebacterium striatum。我们设计了一种快速 PCR 检测方法来检测最常见的人类棒状杆菌属,特别关注 PJI。该方法针对全基因组序列中鉴定出的多磷酸盐激酶基因进行靶向检测。该检测方法可在单次检测中将抗生素耐药的 Corynebacterium jeikeium 和 Corynebacterium urealyticum 与其他物种区分开来。该检测方法应用于来自多个临床来源的人类棒状杆菌属分离株的集合中,并检测到了具有临床相关性的物种。然后,我们对专门与 PJI 相关的 Corynebacterium 分离株进行了检测,所有分离株均被检测到。我们还描述了首例 Corynebacterium simulans PJI 病例。