Effect of Plant Alkaloids on Some Pathogens

This study aimed to evaluate the antimicrobial activity of Rosmarinus officinalis, Origanum vulgare L. and Cressa cretica L. alkaloids on Staphylococcus aureus, Eschrichia coli and Candida albicans. The results showed a prominent inhibitory effect of all alkaloid extracts on all the microbial isolates, noted by the large bacterial growth inhibition zones (0.2–6.8mm), four concentration were used in this study (10, 20, 30 and 40)%, all these concentrations appeared inhibition effect. C. cretica had more inhibitory effect on the growth of all microbes than other tested plants.