不同药敏方法检测替加环素对耐亚胺培南鲍曼不动杆菌敏感性的比较

摘要

Objective To evaluate the susceptibilities of different testing methods of tigecycline against IRAB. Methods MIC and inhibitory zone diameters of 32 strains of IRAB for tigecyclinc were determined by different testing methods.Data were analyzed by comparing the results from each method to those produced by the reference macro broth dilution method. Results The rates of sensitivity intermediate resistance detected by macro broth dilution method , agardilution , MTS and Vitek-2 instrument , disk diffusion method were as follows , 34.375%, 65.625%, 0%, 3.125%, 81.25%, 15.625%, 75%, 25%, 0%, 78.125%, 21.875%, 0%, 3.125%, 81.25%, 15.625%. Compared with macro broth dilution method ,the key major error rate of other methods was 0% by FDA breakpoints , but the CA and EA rates were less than 90%. Conclusions Tigecycline has good activity against the IRAB, with significant difference in susceptible rate among the different methods.%目的：比较5种体外药敏方法测定替加环素对耐亚胺培南鲍曼不动杆菌（IRAB）药敏结果的差异。方法：分别采用5种不同药敏方法检测32株IRAB对替加环素的敏感性，并以宏量肉汤稀释法为参考方法，评估其他四种方法与参考方法的一致性。结果：宏量肉汤稀释法、琼脂稀释法、Vitek-2仪器法、MTS法、纸片扩散法检测32株 IRAB 对替加环素敏感率分别为34．375％，3．125％，75％，78．125％，3．125％，中介率为65．625％、81．25％、25％、21．875％、81．25％，耐药率为0％、15．625％、0％、0％、15．625％。以宏量肉汤稀释法为参考，按FDA标准，其余4种方法均无重大误差，但基本一致率与分类一致率均低于90％。结论：替加环素对IRAB有较好的抗菌活性，但不同方法之间敏感率有所不同。