10.22376/ijpbs.2019.10.1.p1-12 Volume 5 Issue 1 2014 (January - March) Mangroves have wide applications in folk medicine since ages due to the presence of several bioactive compounds. This study aims to explore the antimicrobial activity of ten mangroves commonly found in Indian Sundarban region namely lessThan i greaterThan Avicennia alba, lessThan /i greaterThan lessThan i greaterThan Avicennia marina, lessThan /i greaterThan lessThan i greaterThan Avicennia officinalis, Excoecaria agallocha, lessThan /i greaterThan lessThan i greaterThan Sonneratia caseolaris, Sonneratia apetela lessThan /i greaterThan , lessThan i greaterThan Aegiceres corniculatum, Acanthus ilicifolius, Nypa fruticans and Ceriops decandra lessThan /i greaterThan . Different leaf extracts were prepared and used for disc assay against lessThan i greaterThan Agrobacterium tumefaciens lessThan /i greaterThan , lessThan i greaterThan Escherichia coli lessThan /i greaterThan , lessThan i greaterThan Streptococcus mutans, Staphylococcus aureus lessThan /i greaterThan , lessThan i greaterThan Aspergillus flavus lessThan /i greaterThan and lessThan i greaterThan Tricophyton rubrum lessThan /i greaterThan with different concentrations. lessThan i greaterThan Avicennia lessThan /i greaterThan lessThan i greaterThan marina, Avicennia alba, Acanthus ilicifolius, Ceriops decandra lessThan /i greaterThan and lessThan i greaterThan Excoecaria lessThan /i greaterThan lessThan i greaterThan agallocha lessThan /i greaterThan showed better antimicrobial potential than the others. Additionally, lessThan i greaterThan Acanthus lessThan /i greaterThan lessThan i greaterThan ilicifolius lessThan /i greaterThan and lessThan i greaterThan Avicennia lessThan /i greaterThan lessThan i greaterThan marina lessThan /i greaterThan extracts were most active in the lowest concentration. The highest activity was shown by acetone extract of lessThan i greaterThan Avicennia alba lessThan /i greaterThan against lessThan i greaterThan Staphylococcus aureus lessThan /i greaterThan where diameter of the zone of inhibition was 15.6 mm followed by ethyl acetate extract of lessThan i greaterThan Avicennia alba lessThan /i greaterThan with 11.9 mm zone of inhibition. MADHURIMA BAKSHI AND PUNARBASU CHAUDHURI mangrove, antimicrobial, MIC, Sundarban 294-304