广州医药 ›› 2015, Vol. 46 ›› Issue (3): 25-27.DOI: 10.3969/j.issn.1000-8535.2015.03.007

• 论著 • 上一篇    下一篇

广州地区儿童社区获得性耐甲氧西林金黄色葡萄球菌分子特征研究

李敏豪1, 董超1, 王成兴2, 董婉华3, 冯素娥1, 刘凤鸣1   

  1. 1 广州市黄埔区妇幼保健院儿科(广州 510700)
    2 广州市第一人民医院胃肠外科(广州 510180)
    3 广州市第一人民医院骨科(广州 510180)
  • 收稿日期:2015-03-03 出版日期:2015-05-20 发布日期:2021-11-30
  • 通讯作者: 李敏豪,E-mail:gzliminhao@163.com
  • 基金资助:
    2013年广州市医药卫生科技一般引导项目(20131A011186);2013年广州市黄埔区科技计划项目(201329-15)

The molecular characteristics of Community-acquired Methicillin-resistant Staphylococcus aureus isolated from pediatric patients in Guangzhou

Li Minhao, Dong Chao, Wang Chenxing, Dong Wanhua, Feng Sue, et al   

  1. Department of Pediatrics, Guangzhou Huangpu District Maternal and Children Health Hospital, Guangzhou 510700, China;
    Department of Gastrointestinal Surgery, Guangzhou First People's Hospital, Guangzhou 510180, China;
    Department of Orthopedics, Guangzhou First People's Hospital, Guangzhou 510180, China
  • Received:2015-03-03 Online:2015-05-20 Published:2021-11-30

摘要: 目的 了解广州地区儿童患者分离的社区获得性耐甲氧西林金黄色葡萄球菌(CA-MRSA)临床分离株的分子特征。方法 收集2009年—2014年我院分离获得的65株CA-MRSA临床分离株,PCR法检测杀白细胞素(PVL)基因阳性菌株,多位点基因序列类型(MLST)测定MRSA菌株的序列类型,多重PCR法对MRSA菌株进行葡萄球菌mec盒式染色体(SCCmec)分型。结果 65株CA-MRSA分离株中PVL基因阳性31株,阳性率47.69%;MLST分型表明以ST5933.84%(22/65)及ST8823.07%(15/65)为主;SCCmec分型中发现3种类型,分别为SCCmecⅡ 32.30%(21/65)、SCCmecⅣ 49.23%(32/65)及SCCmecⅤ 18.46%(12/65),未存在未能分型菌株。结论 广州地区儿童患者分离的CA-MRSA临床分离株的PVL基因阳性率相对较高,SCCmecIV型、V型可形成小范围内的流行,其基因表型存在多种ST分型。

关键词: 社区获得性, 耐甲氧西林, 金黄色葡萄球菌, 儿童, 基因型, 广州地区

Abstract: Objective To investigate the molecular characteristic of Community-acquired Methicillin-resistant Staphylococcus aureus(CA-MRSA) isolates from pediatric patients in Guangzhou. Methods 65 non-duplicate strains of Community-acquired Methicillin-susceptible Staphylococcus aureus(CA-MSSA) isolated from our hospital in 2009-2014 were investigated. Panton-valentine leukocidin(PVL) gene was detected by polymerase chain reaction(PCR). The sequence type (ST) of each strain was determined by muhilocus sequence typing (MLST). The genotypes of staphylococcal cassette chromosome mec(SCCmec) of the CA-MRSA isolates were confirmed by multiplex PCR. Results Among 65 isolates of CA-MRSA, the positive rate of PVL genes was 47.69%(31/65). The most common MLST type was ST59 (n=22, 33.84%), followed by ST88 (n=15, 23.07%). Three SCCmec types were found. The most common type was SCCmecIV (49.23%, 32/65), followed by SCCmecⅡ (32.30%, 21/65) and SCCmecV (8.46%, 12/65). Conclusion The PVL gene-positive rate of CA-MRSA isolates in our hospitals is at a relatively high level. SCCmec type IV and SCCmec type V could spread among hospitals and cause a small scale epidemic. Their phenotypes have a variety of ST types.

Key words: Community-acquired, Methicillin-resistant, Staphylococcus aureus, Child, Genotype, Guangzhou