Background and aim: The aims of this study were to establish antibiotic profile and the molecular epidemiology of Acinetobacter baumannii isolates, with considering the effectiveness of control infection measures across three hospitals in the Kurdistan, west part of Iran.
Methods: Fifty-four A. baumannii isolates were collected from patients and environmental specimens. Antibiotic susceptibility patterns (Antibio-type) were evaluated for 17 different antibiotics and MIC for imipenem was done. Isolates were assessed for the presence of metallo-beta-lactamases (MBLs), class 1 and 2 integrons, and integrated gene cassettes and blaOXA-likefamilies genes. Repetitive-sequence-based PCR (REP-PCR) was done for analysing clonality and relativeness of isolates (REP-type).
Results: Antibiotic susceptibility patterns distinguished 11 distinct Antibio-types and REP-PCR showed three clusters with 20 subclusters, mostly belonged to two clonal subgroups, A1 and B1. blaOXA-51 and blaOXA-23 were detected in 100% (54/54) and 52% (28/54), respectively, while blaOXA-24-like and blaOXA-58 were not present in isolates. MBLs were not detected, but, however, high rate of imipenem resistance was observed (52%). MIC90 of imipenem was 16 mg/ml. Class 1 integrons were detected in 11% (6/54) of isolates followed by 24% (13/54) of class 2. Both classes of integron genes were detected in 15% (8/54) of isolates. Integrated gene cassettes were in low level (11% of class 1 harboring isolates). Two arrays of gene cassettes were revealed, dfrA5-like and dfrA17-aadA5.
Conclusion: Infection control surveillance should be considered as a serious manner, even the superficial eradication of hospital acquired pathogens. MBL genes were not induced carbapenem resistance in studied hospital settings, but blaOXA-51 & 23 contributed in imipenem resistant. Integrons had a little share in resistance of A. baumannii isolates. 相似文献
目的研究多重耐药铜绿假单胞菌中1、2类整合酶基因及1类整合子标志基因的携带情况。方法用纸片扩散法做耐药菌株的药敏试验。聚合酶链反应(PCR)扩增检测intI1、intI2整合酶基因,1类整合子标志基因su l 1和qacEΔ1,扩增产物纯化后基因测序分析。结果铜绿假单胞菌对3类或3类以上抗生素耐药,大多对阿莫西林-克拉维酸、庆大霉素、环丙沙星和哌拉西林耐药,且与1类整合子的存在密切相关。intI1整合酶基因阳性率为97.5%(78/80),而intI2整合酶基因的阳性率为6.25%(5/80);1类整合子的su l 1和qacEΔ1的阳性率分别为92.5%(74/80)和81.2%(65/80)。结论铜绿假单胞菌的耐药与耐药基因传递的新机制———整合子系统密切相关。 相似文献
目的了解浙江省湖州解放军第98医院从临床分离的常见医院感染多重耐药革兰阴性杆菌Ⅰ类整合子存在状况。方法从临床分离鲍曼不动杆菌60株、铜绿假单胞菌30株、阴沟肠杆菌20株、嗜麦芽窄食单胞菌19株和黄杆菌属15株(脑膜败血性黄杆菌12株、产吲哚金黄杆菌3株),采用聚合酶链反应及序列分析的方法检测Ⅰ类整合子标志物 int Ⅰ 1及qacE△1 基因。结果鲍曼不动杆菌、铜绿似单胞菌、阴沟肠杆菌、嗜麦芽窄食单胞菌和黄杆菌属中 int Ⅰ 1基因阳性率分别为58.3%、0、95.0%、0和0,qacE△1基因阳性率分别为83.3%、83.3%、85.0%、10.5%和0。合计144株中 int Ⅰ 1和 qacE△1阳性株数(%)分别为54株(37.5%)、94株(65.3%),Ⅰ类整合子标志物总阳性率为68.1%(98/144)。结论解放军第98医院从临床分离的常见医院感染多重耐药革兰阴性杆菌Ⅰ类整合子携带率相当高。 相似文献