使用多位点序列分型(MLST)对伊斯法罕耐甲氧西林分离株的临床样本进行基因分型。
Genotyping of Clinical Samples of Methicillin-Resistant Isolates in Isfahan Using Multilocus Sequence Typing (MLST).
作者信息
Ahmadi Yasaman, Shekarchizadeh Farnoosh, Khajavirad Farnood, Shekarchizadeh Afrouz, Shokri Dariush
机构信息
Department of Microbiology, Kish International Branch, Islamic Azad University, Kish Island, Iran.
Department of Genetics, Faculty of Science, Shahrekord University, Shahrekord, Iran.
出版信息
Can J Infect Dis Med Microbiol. 2025 Jun 1;2025:7307394. doi: 10.1155/cjid/7307394. eCollection 2025.
Effective management of hospital-acquired infections caused by necessitates a comprehensive understanding of bacterial characteristics. The genotyping of clinical samples of methicillin-resistant (MRSA) isolates plays a crucial role in understanding the pathogen's epidemiology, etiology, and antibiotic resistance patterns. This study investigated the genotyping and antibiotic resistance profiles of clinically isolated strains from different hospitals in Isfahan, Iran. Sixty-three MRSA isolates were analyzed using the disc diffusion method. After DNA extraction, multilocus sequence typing (MLST) was performed using seven housekeeping genes, revealing genetic diversity. Six isolates were selected based on their resistance patterns for MLST. The most frequent isolates were detected from wounds (41.3%), and the lowest frequency was from synovial samples (1.6%). Based on the antibiotic resistance pattern, the highest antibiotic resistance of isolates was related to tetracycline, ciprofloxacin, and clindamycin at 68.3%, 44.4%, and 44.4%, respectively. In contrast, 96.8% and 95.2% of the isolates were sensitive to nitrofurantoin and linezolid. Among resistant isolates, six sequence types (STs) were identified, including ST74, ST239, ST805, ST531, ST859, and ST5. This study highlights the prevalence, antibiotic resistance, and genetic diversity of MRSA isolates in Isfahan, Iran. The identification of clonal complexes (e.g., CC5, CC8, CC30) suggests clonal spread, emphasizing the importance of surveillance and prevention strategies.
有效管理由……引起的医院获得性感染需要全面了解细菌特征。耐甲氧西林金黄色葡萄球菌(MRSA)分离株临床样本的基因分型在了解病原体的流行病学、病因及抗生素耐药模式方面起着关键作用。本研究调查了伊朗伊斯法罕不同医院临床分离的金黄色葡萄球菌菌株的基因分型和抗生素耐药谱。使用纸片扩散法对63株MRSA分离株进行了分析。DNA提取后,使用7个管家基因进行多位点序列分型(MLST),揭示了遗传多样性。根据耐药模式选择了6株分离株进行MLST。最常见的分离株来自伤口(41.3%),最低频率来自滑膜样本(1.6%)。根据抗生素耐药模式,金黄色葡萄球菌分离株的最高抗生素耐药率分别与四环素、环丙沙星和克林霉素相关,为68.3%、44.4%和44.4%。相比之下,96.8%和95.2%的分离株对呋喃妥因和利奈唑胺敏感。在耐药分离株中,鉴定出6种序列类型(STs),包括ST74、ST239、ST805、ST531、ST859和ST5。本研究突出了伊朗伊斯法罕MRSA分离株的流行情况、抗生素耐药性和遗传多样性。克隆复合体(如CC5、CC8、CC30)的鉴定表明存在克隆传播,强调了监测和预防策略的重要性。