Abstract

Mohammad Rahbar* and Kambiz Diba

Cranberries have long been the focus of interest for their beneficial effects in preventing urinary tract infections (UTIs). The objective of this study was to determine in vitro activity of cranberry extract on common etiologic agents of urinary tract infections isolated from patients. Filter sterilized methanol extract of cranberry was prepared and used in the present study. The minimum inhibitory concentration (MIC) was evaluated for active crude extract. The MIC value of methanol extract were 0.391 mg/ml for Enterobacter aerogenes and Staphylococcus aureus whereas the MIC of methanol extract of cranberry were 1.2500 and 0.0195 mg/ml for Escherichia coli and Klebsiella pneumoniae respectively. The lower MIC value of cranberry extract against K. pneumoniae in comparison to other three organisms suggests that K. pneumoniae showed greater sensitivity towards the extracts of the cranberry extract.