Full Length Research Paper
Calyptrochilum emarginatum is an epiphytic shrub belonging to the orchid family with numerous medicinal uses. Phytochemical investigation of the leaf extractives revealed the presence of tannins, flavonoids, carbohydrates, terpenes, sterols and saponins. Alkaloids and cardiac glycosides could not be detected. Antimicrobial studies of the extracts revealed that at a minimum inhibitory concentration (MIC) of 1.6 mg/ml, the hexane and methanol successive extracts exhibited bactericidal activities against Staphylococcus aureus. The straight run methanol extract and the successive ethyl acetate extract did not show any activity against all the microorganisms investigated namely, S. aureus, Candida albicans, Klebsiella pneumonia, Escherichia coli and Salmonella paratyphi at the same concentration.
Key words: Calyptrochilum emarginatum, orchid, phytochemicals, antimicrobial, minimum inhibitory concentration (MIC).
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