SCCmec genotypes and drug resistance analysis of isolated MRSA in children
-
摘要: 目的 了解亳州地区儿童耐甲氧西林金黄色葡萄球菌(methicillin resistant staphylococcus aureus,MRSA)的SCCmec基因分型及其耐药性。 方法 收集2018年12月—2019年3月亳州市人民医院儿科共6个病区临床分离的89株MRSA菌株,采用PCR方法对其进行SCCmec基因分型;VITEK 2 compact全自动微生物分析仪进行抗菌药物敏感性试验,并采用WHONET 5.6软件统计药敏结果并进行分析。 结果 89株MRSA以SCCmecⅣa型为主,占55.1%(49/89),其次SCCmecⅢ型12.4%(11/89),SCCmecⅡ型1.1%(1/89),未分型31.4%(28/89),未见SCCmecⅠ型和Ⅴ型;89株MRSA对青霉素均耐药,对红霉素、克林霉素均高耐药,耐药率分别为87.6%、62.9%,对喹诺酮类、庆大霉素、甲氧苄啶/磺胺甲恶唑的耐药率均低于10%;而49株SCCmecⅣa型对红霉素、克林霉素的耐药率略升高,分别为91.8%、77.6%,对喹诺酮类药物耐药率4.1%,有所下降,而对甲氧苄啶/磺胺甲恶唑、庆大霉素均敏感;以上菌株未发现对万古霉素、利奈唑胺、奎奴普丁/达福普汀及替加环素耐药。 结论 目前亳州地区儿童分离的MRSA主要以SCCmecⅣa型为主要流行株,对多种抗菌药物呈不同程度耐药。
-
关键词:
- 儿童 /
- 耐甲氧西林金黄色葡萄球菌 /
- SCCmec基因分型 /
- 耐药性
Abstract: Objective To investigate the SCCmec genotypes and drug resistance of methicillin-resistant staphylococcus aureus(MRSA) isolated from children in Bozhou, Anhui province. Methods From December 2018 to March 2019, 89 MRSA strains isolated from 6 pediatrics wards in the People's Hospital of Bozhou were collected. The SCCmec genotypes of MRSA strains were detected by PCR. Antimicrobial susceptibility test was performed by VITEK 2 compact. Statistical analysis was performed using WHONET 5.6 software. Results Among 89 MRSA strains, SCCmec Ⅳa was the main type, accounting for 55.1%(49/89) of the total strains, followed by SCCmec type Ⅲ 12.4%(11/89), SCCmec type 1.1%(1/89), respectively. Untyped 31.4%(28/89)and SCCmecⅠ and Ⅴ type were not detected. All MRSA strains were resistant to penicillin and the resistance rates to erythromycin and clindamycin were higher, which was 87.6% and 62.9% respectively. The resistance rates to quinolones, gentamicin and trimethoprim/sulfamethoxazole were less than 10%. The resistance rates of the 49 strains of SCCmec type Ⅳa to erythromycin and clindamycin were slightly increased, which was 91.8% and 77.6%, respectively, while the resistance rate to quinolones was 4.1%, and all of the 49 strains were susceptible to gentamicin and trimethoprim/sulfamethoxazole. None of the MRSA strains were found to be resistant to vancomycin, linezolid, quinupristin/dalfopristin and tigecycline. Conclusion The prevalence of MRSA isolated from children in Bozhou was mainly SCCmec Ⅳa type strains, and they showed various degrees of resistance to different antimicrobial agents.
点击查看大图
计量
- 文章访问数: 195
- HTML全文浏览量: 31
- PDF下载量: 0
- 被引次数: 0