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首页> 外文期刊>Journal of medical bacteriology. >Biofilm Formation by Bacteria Isolated from Intravenous Catheters
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Biofilm Formation by Bacteria Isolated from Intravenous Catheters

机译：从静脉导管分离细菌的生物膜形成。

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Background: Reports on the association of nosocomial bacterial infections with indwelling medical devices such as intravenous catheters (IVC) has increased in recent years. The potential to form biofilm on these devices seems to be the main reason for establishment of such infections. The aim of this study was to measure the potential of biofilm formation by bacterialisolates from IVCs.Methods: Seventy-one IVCs were collected from hospitalized patients in ICU, NICU, hematology and oncology wards at Taleghani Hospital from Jan 2010 to Jan 2011. The bacterial isolates were identified using the standard biochemical tests and the potential to form biofilms was determined by the microtiter plate assay method (MTP) and colony morphology using Congo red agar plates (CRA).Results: Overall, 54 (71%) IVCs were colonized and 76 bacteria were isolated among which, 64 (84.2%) were coagulase negative staphylococci (CoNS), 3 (3.9%) S. aureus, 3 (3.9%) Enterococcus spp., 2 (2.6%) E. coli and 4 (5.3%) were miscellaneous isolates not further identified. Among the CoNS, biofilm formation was observed in 68.7% and 82.8% of bacteriausing MTP and CRA methods, respectively. S. aureus and E. coli isolates also were biofilm producers but Enterococcus and other unknown isolates were biofilm negative.Conclusions: Our results confirm that the prevalent biofilm forming bacteria on IVCs were CoNS and that was the reason for high rates of nosocomial infections.
机译：背景：近年来，有关医院内细菌感染与留置医疗设备（如静脉导管（IVC））的关联的报道有所增加。在这些设备上形成生物膜的可能性似乎是建立此类感染的主要原因。方法：从2010年1月至2011年1月在Taleghani医院的ICU，NICU，血液科和肿瘤科病房的住院患者中收集了71个IVC。使用标准的生化测试鉴定出分离株，并通过微量滴定板测定法（MTP）和使用刚果红琼脂板（CRA）鉴定菌落形态来确定形成生物膜的可能性。结果：总体上，对54个（71％）IVC进行了定殖和分离出76种细菌，其中凝固酶阴性葡萄球菌（CoNS）64种（84.2％），金黄色葡萄球菌3种（3.9％），肠球菌3种（3.9％），大肠杆菌2种（2.6％）和4种（5.3） ％）是未进一步鉴定的其他分离株。在CoNS中，使用MTP和CRA方法分别在68.7％和82.8％的细菌中观察到生物膜形成。金黄色葡萄球菌和大肠杆菌分离株也是生物膜产生者，但肠球菌和其他未知分离株也是生物膜阴性。结论：我们的结果证实，IVC上流行的生物膜形成细菌是CoNS，这就是医院感染率高的原因。

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