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耐甲氧西林凝固酶阴性葡萄球菌的耐药性 被引量:7

Resistance to antibiotics for methicillin resistance to coagulase negative staphylococci
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摘要 目的 观察凝固酶阴性葡萄球菌 (CNS)对甲氧西林等的耐药性和β-内酰胺酶的产生率 ,指导临床用药 .方法 对本院临床感染标本常规分离鉴定菌株 ,药敏试验应用 K- B纸片扩散法 ,按 NCCL S规定的标准进行 ,耐甲氧西林凝固酶阴性葡萄球菌 (MRCNS) MIC测定应用 Vitex微生物自动分析系统 ,β-内酰胺酶检测采用碘量试管法 .结果  CNS95株中 MRCNS的分离率为 39% ,β-内酰胺酶的阳性率为 6 3% ,MRCNS的产酶率为 95 % ,对甲氧西林敏感的葡萄球菌(MSCNS)的产酶率为 43% ;95株 CNS对万古霉素 10 0 %敏感 ,对氨苄青、青霉素、红霉素最低耐药率为 85 % ,对头孢哌酮、头孢唑林、舒普深最低敏感率为 83% .结论  MRCNS和MSCNS的产酶率与对甲氧西林的耐药性呈正相关 ,MRCNS与产 β-内酰胺酶葡萄球菌间的耐药率无显著差异 .目前万古霉素和舒普深是治疗 MRCNS和产酶 AIM To study the methicillin resistance to coagulase negative staphylococci to methicilin and other antibiotics, and producing rats of beta lactamase for coagulasenegative staphylococci(CNS) in order to indicate clinical selecting drugs. METHODS All isolates were indentified by routine procedure, K B paper disk diffusion in accordance with the NCCLS standards was employed for drug sensitivity tests. VITEK microbe auto analysis instrument was used for measurement of MIC of MRCNS. Beta lactamase was measured by iodine volume tube method. RESULTS The isolating rate of MRCNS in 95 strains of CNS was 39%. The positive rates of beta lactamase of CNS, MRCNS and MSCNS were 63%, 95%, 43% respectively; The susceptibility for vancomycin of CNS was 100%.The lowest drug resistance rates of CNS to ampicillin,penicillin,erythromycin were 85%. The lowest susceptibility rates of CNS to cepoperazone,cefazolin,sulperazone were 83%. CONCLUSION The zymogenic rates of MRCNS and MSCNS were related with resistance to methicillin. The difference of the drug resistance rates between MRCNS and zymogenic CNS was not prominent. Now in the case of MRCNS and zymogenic CNS, vancomycin and sulperazone are the best choices. MRCNS' drug resistance should be paid attention broadly.
出处 《第四军医大学学报》 2000年第10期1256-1258,共3页 Journal of the Fourth Military Medical University
关键词 CNS 阴性葡萄球菌 甲氧西林 耐药性 Β-内酰胺酶 coagulase negative staphylococci methicillin resistance to coagulase negative staphylococci drug resistance beta lactamase
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