Abstract
Phytochemical investigation was carried out on the crude chloroform, ethanol and aqueous extracts of the leaves of Callistemon citrinus L. belonging family Myrtaceae. The extracts were subjected to screening for determination of their potent antimicrobial activity against various microorganisms like Bacillus subtilis, Bacillus pumilis and Escherichia coli etc. Streptomycin (25 µg/ml) was used as a standard drug. Results were subjected to minimum inhibitory concentration assay by two-fold dilution method. The chloroform extract exhibited moderate to significant antimicrobial activity against all the tested microbial strains. The alcoholic extract exhibited moderate antimicrobial activity. The aqueous extract was devoid of any antimicrobial activity. The results showed that the chloroform extract was more potent than the ethanolic extract.
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