10.22376/ijpbs.2019.10.1.p1-12 Volume 4 Issue 3 2013 (July - September) The present investigation was undertaken to evaluate antimicrobial activities of different extracts (ethanol, methanol, petroleum ether and aqueous solutions) of lessThan i greaterThan Cassia angustifolia lessThan /i greaterThan plant. Antimicrobial efficacy of various extracts of lessThan i greaterThan C. angustifolia lessThan /i greaterThan was assessed by disc diffusion method against Gram positive bacteria- lessThan i greaterThan Staphylococcus aureus lessThan /i greaterThan (MTCC lessThan i greaterThan 3160) lessThan /i greaterThan , Gram negative- lessThan i greaterThan Escherichia coli lessThan /i greaterThan (MTCC 1652) and lessThan i greaterThan Pseudomonas lessThan /i greaterThan lessThan i greaterThan aeruginosa lessThan /i greaterThan (MTCC 647) and fungi- lessThan i greaterThan Aspergillus niger lessThan /i greaterThan (MTCC282), lessThan i greaterThan Aspergillus flavus lessThan /i greaterThan (MTCC 2456) lessThan i greaterThan , lessThan /i greaterThan lessThan i greaterThan Fusarium oxisporum lessThan /i greaterThan (MTCC349) and lessThan i greaterThan Rhizopus stolonifer lessThan /i greaterThan (MTCC 2591). The ethanol extract exhibited highest zone of inhibition against lessThan i greaterThan P. aeruginosa lessThan /i greaterThan (22.4±0.86mm) with low MIC value (14.8 mg/ml). Phytochemical screening of the extract showed the presence of alkaloids, flavonoids, carbohydrates, proteins, tannins and triterpenoids in lessThan i greaterThan cassia angustifolia lessThan /i greaterThan . ALPANA VYAS AND RENU SARIN Cassia angustifolia, antimicrobial activity, zone of inhibition, phytochemical analysis. 713-718