摘要
目的了解不同医院不同科室金黄色葡萄球菌(SAU)耐药质粒流行状况,分析菌株间的同源性,为控制医院感染流行提供依据。方法采用药敏分析、质粒消除实验、质粒图谱及限制性内切酶图谱等技术对医院感染SAU耐药质粒进行同源性分析。结果从两所省级医院不同科室196份标本中分离到SAU15株,分离率为7.7%;检出菌对所用抗菌药物的耐药率为86.7%,有13.3%的菌株仅耐1种药,对≥3种抗菌药物耐药的有46.7%;在15株分离菌中12株检出质粒,检出率为80.0%;所有菌株均有38kb的大质粒,提示该质粒是医院SAU的流行质粒;对11株携带质粒的耐药SAU进行质粒消除,除2株菌的耐药性始终未变化外,其余9株的耐药性有不同程度地改变,其中3株耐药性全部消失,其余菌株的耐药性仅有部分改变;大小相同的耐药质粒经EcoRⅠ酶切后发现同一科室菌株的耐药质粒有相同的DNA片段,不同科室菌株间也有相似的酶切图谱。结论医院病房存在流行耐药质粒,不同科室有不同的质粒流行,各科室菌株间有一定的同源性。
OBJECTIVE To understand the epidemic condition on the resistant plasmids and their homology of the Staphylococcus aureus obtained from two hospitals in Gansu Province.METHODS The antibiotic sensitivity test,plasmid elimination,plasmid profile,and restriction endonuclease profile were used in analyzing the S.aureus resistant plasmids.RESULTS We isolated 15 strains of S.aureus from 196 samples in two different hospitals,the isolation rate was 7.7%.From them 86.7% isolates were resistant to the seven commonly used antibiotics in different degree.Only 13.3% strains were just resistant to one antimicrobial,the multi-resistant strains amounted for 46.7%.There were 12 isolates carried plasmids（80.0%）.The results of plasmid elimination showed 11 strains carried resistant plasmids,and the one with 38 kb was a popular plasmid.The endonuclease profiles revealed that the same source strains had certain homology,there were similiar endonuclease profiles among strains in different wards.CONCLUSIONS The popular plasmids in different wards have certain homology,and they can be transferred among different strains of bacteria.
出处
《中华医院感染学杂志》
CAS
CSCD
北大核心
2008年第4期457-459,共3页
Chinese Journal of Nosocomiology
基金
甘肃省自然科学基金项目(EZ031-A25-060-E)
