Université de Tunis El Manar, Institut de la Recherche Vétérinaire de Tunisie, 20 rue Jebel Lakhdhar, Bab Saadoun, Tunis 1006, Tunisie; Laboratory of Antimicrobial and Biocide Resistance, CIISA, Faculty of Veterinary Medicine, University of Lisbon, Portugal.
Al-Mokhtar Clinic, Tripoli, Libya.
J Glob Antimicrob Resist. 2017 Sep;10:101-105. doi: 10.1016/j.jgar.2017.04.014. Epub 2017 Jul 17.
The aim of this study was to characterize 32 MRSA isolates recovered from wound specimens of patients in a Hospital in Tripoli, Libya, during 2013.
MRSA isolates were characterized by determining their antibiotic susceptibilities, genes encoding antibiotic resistance and virulence factors, the SCCmec class, agr type, spa typing, PFGE and MLST.
PFGE and MLST revealed that all isolates were clonal and belonged to the Clonal Complex 5 (CC5). They harboured the SCCmecV and the agrII and the spa type was t6065. The majority of isolates were resistant to cefoxitin (32, 100%), penicillin (32, 100%), ampicillin (32, 100%), enrofloxacin (32, 100%), ciprofloxacin (32, 100%), fusidic acid (32, 100%), gentamicin (32, 100%), kanamycin (32, 100%), trimethoprim (32, 100%), and erythromycin (30, 93.7%). The main genes encoding antibiotic resistance were: blaZ (31, 96.8%), ermC (30, 93.7%), aph(3')-III a (3, 9.4%), aac6-aph2 (32, 100%), InuA (3, 9.4%), tetM (3, 9.4%), tetL (3, 9.4%), dfrG (28, 87.5%), fusC (32, 100%). All isolates were PVL negative; however, exfoliative-encoding genes (eta: 25) and enterotxin genes (seb: 32, seo: 32, sei: 32, ser: 32, seu: 32, seg: 32, sej: 32, sed: 31, sen: 29, seh: 26, sec: 26, sea: 6, sek: 5), haemolysin (hla (32), hld (32), hlg (32)) and immune evasion cluster proteins (scn: 32, sak: 32) were relevant.
To the best of our knowledge this is the first report of a specific clonal spread of a multi-drug resistant MRSA-CC5- SCCmecV in a Libyan Hospital.
本研究旨在描述 2013 年利比亚的黎波里一家医院从患者伤口标本中分离的 32 株耐甲氧西林金黄色葡萄球菌(MRSA)。
通过测定抗生素药敏性、抗生素耐药性和毒力因子基因、SCCmec 类、agr 型、spa 型、PFGE 和 MLST 对 MRSA 分离株进行特征分析。
PFGE 和 MLST 显示所有分离株均为克隆株,属于 5 号克隆复合体(CC5)。它们携带 SCCmecV 和 agrII,spa 型为 t6065。大多数分离株对头孢西丁(32 株,100%)、青霉素(32 株,100%)、氨苄西林(32 株,100%)、恩诺沙星(32 株,100%)、环丙沙星(32 株,100%)、夫西地酸(32 株,100%)、庆大霉素(32 株,100%)、卡那霉素(32 株,100%)、复方新诺明(32 株,100%)和红霉素(30 株,93.7%)耐药。主要的抗生素耐药基因包括:blaZ(31 株,96.8%)、ermC(30 株,93.7%)、aph(3')-III a(3 株,9.4%)、aac6-aph2(32 株,100%)、InuA(3 株,9.4%)、tetM(3 株,9.4%)、tetL(3 株,9.4%)、dfrG(28 株,87.5%)、fusC(32 株,100%)。所有分离株均为 PVL 阴性;然而,表皮剥脱毒素编码基因(eta:25 株)和肠毒素基因(seb:32 株,seo:32 株,sei:32 株,ser:32 株,seu:32 株,seg:32 株,sej:32 株,sed:31 株,sen:29 株,seh:26 株,sec:26 株,sea:6 株,sek:5 株)、溶血素(hla(32 株)、hld(32 株)、hlg(32 株))和免疫逃逸簇蛋白(scn:32 株,sak:32 株)相关。
据我们所知,这是利比亚一家医院首次报告特定的多药耐药性 MRSA-CC5-SCCmecV 克隆株的传播。