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- 저자 : ( Om Basukala ) (검색결과 1 건)
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( Shyam K Mishra ),( Prashant Basukala ),( Om Basukala ),( Keshab Parajuli ),( Bharat M Pokhrel ),( Basista P Rijal ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Microbial biofilms pose great threat for patients requiring indwelling medical devices (IMDs) as it is difficult to eradicate them. Besides, sublethal concentration of some antibiotics has been shown to induce biofilm in bacteria. It is, therefore, crucial to follow an appropriate and relevant method for the detection of biofi lms and hence the clinician can choose appropriate antibiotic for the treatment. Methods: This prospective analysis included 65 prosthetic samples. After isolation and identifi cation of bacteria following standard methodology, antibiogram of the isolates were produced following Kirby-Bauer disk diffusion method. Detection of biofi lms was done by tube adherence (TA), Congo red agar and tissue culture plate (TCP) methods. Results: Out of 67 clinical isolates from indwelling medical devices, TCP detected 31 (46.3%) biofi lm producers and 36 (53.7%) biofi lm non-producers. Klebsiella pneumoniae, Pseudomonas aeruginosa and Burkholderia cepacia complex were found to be the most frequent biofi lm producers. The TA method correlated well with the TCP method for biofi lm detection. Higher antibiotic resistance was observed in biofi lm producers than in biofi lm non-producers. The most effective antibiotics for biofi lm producing Gram-positive isolates were Vancomycin and Tigecycline, and that for biofi lm producing Gram-negative isolates were Polymyxin B, Colistin Sulphate and Tigecycline. Conclusions: Nearly forty-six percent of the isolates were found to be biofi lm producers. The antibiotic susceptibility pattern in the present study showed Amoxicillin to be an ineffective drug for isolates from the IMDs. For the detection of biofi lm production, TA method can be an economical and effective alternative to TCP method.
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