Indian Journal of Medical Microbiology Please follow the instructions in this letter carefully. Attached is a PDF page proof of your article, which is scheduled for publication in a forthcoming issue of IJMM. .Its purpose is for the essential correction of errors only, to check the accuracy and positioning of tables and figures and/or approval that no further corrections are required. Proof corrections • Please add corrections or answers to any queries by typing or writing them clearly on a print-out of the PDF page proof or mention the corrections separately with details [Page number, paragraph number, right/left column, line number, corrections (Replace “…..” with “…..”)] • Please check the accuracy of items such as author details • Please check the accuracy and positioning of tables and figures • Please check the accuracy of items such as the title and running heads • Please check for the corruption of special characters such as symbols and Greek letters Reprints • Please print out the attached Reprint Order Form and fill in the appropriate details. • Complete the form in clear block letters and return it by post/courier to arrive within 2 days of receipt. • Please ensure that your full name, address and telephone details are supplied Return your corrections to: E-mail:
[email protected] If corrections are done in hard copy, please return to: MEDKNOW PUBLICATIONS PVT LTD, A-109, Kanara Business Centre, Off Link Rd, Ghatkopar (E), Mumbai - 400 075, INDIA
Last Date to Return the Proofs 17/10/2008
Indian Journal of Medical Microbiology, (2008) 26(4): 333-7
Original Article
CORRELATION BETWEEN BIOFILM PRODUCTION AND MULTIPLE DRUG RESISTANCE IN IMIPENEM RESISTANT CLINICAL ISOLATES OF ACINETOBACTER BAUMANNII R Srinivasa Rao, R Uma Karthika, SP Singh, P Shashikala, R Kanungo, S Jayachandran, *K Prashanth
Abstract Purpose: To study the qualitative and quantitative methods for the investigation of biofilm formation and to examine the correlation between biofilm and antibiotic resistance among the clinical isolates of Acinetobacter baumannii. We also verified the association between biofilm and presence of extended spectrum β-lactamases, particularly, blaPER-1. Methods: A total of 55 isolates were subjected to susceptibility testing by disc diffusion method for 13 clinically relevant antibiotics. Screening for biofilm production was done by both qualitative and quantitative methods through tube and microtitre plate assay respectively. The presence of blaPER-1 was checked by PCR. Results: A. baumannii isolates showed very high resistance (>75%) to imipenem, cephotaxime, amikacin and ciprofloxacin. Only cefoperazone, netillin and norfloxacin were found to be effective agents. Results of microtitre and tube methods were concordant with 34 isolates (62%) showing biofilm formation. Resistance to four antibiotics such as amikacin (82% vs. 17.6%, P
