■比较改良Hodge试验(MHT)和碳青霉烯类灭活方法(CIM)中添加TritonX-100前后检测鲍曼不动杆菌中碳青霉烯酶的敏感性和特异性。
■共选择了135株鲍曼不动杆菌(碳青霉烯抗性83株,碳青霉烯敏感性52株),并使用PCR检测了碳青霉烯酶基因型。使用MHT测试了碳青霉烯酶表型,Triton-MHT(THT),CIM,修改CIM(mCIM),和Triton-CIM(TCIM)。在TCIM中使用不同浓度(0.05、0.1、0.25和0.5%v/v)的TritonX-100。
■灵敏度测定为59.03%(MHT),100%(THT),6.02%(CIM),8.43%(mCIM),71.08%(TCIM0.05%),100%(TCIM0.1%),97.59%(TCIM0.25%),83株碳青霉烯酶分离株中96.38%(TCIM0.5%),这些方法的特异性为100%。
■使用MHT和CIM时添加TritonX-100可以显着提高检测鲍曼不动杆菌碳青霉烯酶的灵敏度,特异性为100%。0.1%v/vTritonX-100的浓度在TCIM中显示出最佳结果。
UNASSIGNED: To compare the sensitivity and specificity before and after the addition of Triton X-100 in the modified Hodge test (MHT) and carbapenem inactivation method (CIM) for the detection of carbapenemase in Acinetobacter baumannii.
UNASSIGNED: A total of 135 isolates of A. baumannii (83 carbapenem-resistant and 52 carbapenem-sensitive) were selected and the carbapenemase genotypes were detected using PCR. Carbapenemase phenotypes were tested using the MHT, Triton-MHT (THT), CIM, modified CIM (mCIM), and Triton-CIM (TCIM). Different concentrations (0.05, 0.1, 0.25, and 0.5% v/v) of Triton X-100 were used in the TCIM.
UNASSIGNED: The sensitivity was determined to be 59.03% (MHT), 100% (THT), 6.02% (CIM), 8.43% (mCIM), 71.08% (TCIM 0.05%), 100% (TCIM 0.1%), 97.59% (TCIM 0.25%), and 96.38% (TCIM 0.5%) in 83 carbapenemase-producing isolates, and the specificity for each of these methods was 100%.
UNASSIGNED: The addition of Triton X-100 while using the MHT and CIM could significantly improve the sensitivity in the detection of A. baumannii carbapenemase with a specificity of 100%. A concentration of 0.1% v/v Triton X-100 showed the best results in TCIM.