Abstract
In vitro synergistic antibacterial effects among Alocasia macrorrhizos rhizome, Amorphophallus paeoniifolius corm and Colocasia esculenta corm extracts were tested against six resistant bacteria viz., Yersinia enterocolitica, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Clostridium difficile and Staphylococcus aureus. The inhibition zone was compared with the commercially available antibiotic (tetracycline). High inhibitory activity was observed against E. coli (12.670.33 mm) and S. aureus (12.500.29 mm) for methanol extract at 800 mgml-1 of concentration. MIC and MBC of the extracts ranged from 200-580 mgml-1 and 250-650 mgml-1 respectively. The lowest MIC and MBC of the extracts were measured against E. coli.
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