10.22376/ijpbs.2019.10.1.p1-12 Volume 3 Issue 1 2012 (January - March) Phytochemical screening and antimicrobial activity of chloroform, acetone and methanolic extracts of lessThan i greaterThan Calotropis procera lessThan /i greaterThan (Ait.) R. Br. (Asclepiadaceae) flowers were tested against various pathogens such as lessThan i greaterThan Salmonella paratyphi, S. paratyphi A, Bacillus subtilis, Bacillus thuringiensis, Proteus mirabilis, Proteus vulgaris, Pseudomonas aeruginosa, Staphylococcus aureus lessThan /i greaterThan and lessThan i greaterThan Escherichia coli. lessThan /i greaterThan Phytochemical screening recorded positive results for alkaloids, tannins, steroids, glycosides, saponins, phenols and flavonoids. Among which flavonoids and steroids showed maximum degree of precipitation. Negative results are obtained for fixed oils. Maximum antibacterial activity was showed against lessThan i greaterThan Staphylococcus aureus lessThan /i greaterThan and lessThan i greaterThan Bacillus subtilis. lessThan /i greaterThan M. Rama Prabha And K. Vasantha Calotropis procera, antibacterial activity, pathogens, MIC 01-06