10.22376/ijpbs.2019.10.1.p1-12 Volume 4 Issue 2 2013 (April - June) The antibacterial activities of hexane, ethyl acetate, acetone, ethanolic, methanolic and aqueous extracts of lessThan i greaterThan Mangifera indica lessThan /i greaterThan kernel were studied lessThan i greaterThan in vitro lessThan /i greaterThan against aquatic pathogens viz. lessThan i greaterThan Aeromonas hydrophila lessThan /i greaterThan (six strains lessThan i greaterThan ) lessThan /i greaterThan , lessThan i greaterThan Pseudomonas putida lessThan /i greaterThan (three strains), lessThan i greaterThan P. aeruginosa lessThan /i greaterThan (three strains), lessThan i greaterThan P. fluorescens lessThan /i greaterThan (two strains), lessThan i greaterThan Flavobacterium columnare lessThan /i greaterThan (three strains), lessThan i greaterThan Vibrio parahaemolyticus lessThan /i greaterThan (two strains), lessThan i greaterThan V. alginolyticus lessThan /i greaterThan (two strains), lessThan i greaterThan V. fluvialis lessThan /i greaterThan , lessThan i greaterThan V. harveyi lessThan /i greaterThan , lessThan i greaterThan Edwardsiella lessThan /i greaterThan lessThan i greaterThan tarda lessThan /i greaterThan (two strains) and animal pathogen, lessThan i greaterThan Escherichia coli lessThan /i greaterThan (five strains). The ethanolic extract showed higher antibacterial activities against almost all tested microorganisms with minimum inhibitory concentration (MIC) ranged from 200-300μg. The highest zone size were exhibited in acetone extract (22.16mm/400μg) against one strain of lessThan i greaterThan A. hydrophila lessThan /i greaterThan and ethanolic extract (19mm/400μg) against three strains of lessThan i greaterThan A. hydrophila lessThan /i greaterThan and one strain of lessThan i greaterThan P. aeruginosa. lessThan /i greaterThan The MIC of aqueous extract was 250-400μg with zone size ranged of 7.66-13.5mm. In phytochemical analysis, ethanolic, methanolic and aqueous extract showed the presence of saponin, flavonoid, alkaloid, tannin and sterol. The study showed that various extracts of mango kernel have potentialities in using against aquatic bacterial pathogens. SWAGATIKA SAHU, BASANTA KUMAR DAS AND BIBHUDENDU KUMAR MISHRA Mangifera indica, antibacterial activity, phytochemicals, aquatic pathogens 809-818