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Ellagic acid and Gallic acid are polyphenols which have shown beneficial effects in animal models of colitis. In the present study Ellagic acid and Gallic acid were evaluated for antibacterial potential against clinical IBD isolates. (HM95, HM233, HM251, HM615).Cytotoxicity was determined against human colorectal adenocarcinoma cells (Caco2, COLO.205, HT.29), whereas, cytocompatibility against normal rat intestinal epithelial (IEC-6) using MTT assay. Ellagic acid showed the lowest MIC and MBC value of 2.5 mg/mL and 5 mg/mL respectively against HM251 and HM233. Gallic acid exhibited the lowest MIC and MBC value of 1.25 mg/mL and 2.5 mg/mL respectively against HM251 and HM615.Cytotoxicity assay resulted in reduction of percent cell viability when tested at concentrations ranging from 400-12.5 µg/mL. The polyphenols presented a concentration-dependent deduction in percent cell viability after 48 h exposure It is likely that these polyphenols are good anti-colitic agents. However, further investigations are required.

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