Abstract

Antibacterial activity of Allium sativum (garlic), Zingiber officinale (ginger) andPiper nigrum (pepper) extracts has been evaluated against Klebsiella pneumoniae, Staphylococcus aureus, Morganella morgani, Candida albicans, Escherichia coli and Proteus vulgaris. Among ten extracts evaluated for antimicrobial activity garlic extract showed excellent antibacterial activity againstP. vulgaris and M. morgani and the garlic extracts showed excellent antimicrobial activity against almost of all pathogens tested. The ginger extract, however, showed only a moderate antimicrobial activity against P. aureus, whereas the pepper extract showed the least activity against the test organisms.

Key words: Antimicrobial activity, pathogens, Allium sativum, Zingiber officinale, Piper nigrum, parts per million (ppm).