LEE Seong Wei, NAJIAH Musa, WENDY Wee
pp. 5-7

This study was revealed antimicrobial property of Colocasia esculenta against 5 strains of Vibrio spp. The increasing of antibiotic resistance cases among pathogenic bacteria such as Vibrio spp. posed a problem to aquaculture industry. Most of the antibiotics were no longer effective in controlling pathogenic bacteria in aquaculture. Therefore, this study was carried out to seek the potential of C. esculenta to alternate commercial antibiotic as antimicrobial agent against Vibrio spp. Three parts (leaf, stem and legume) of C. esculenta were extracted by using methanol and distilled water. The extractions were subjected to antimicrobial test by using disk diffusion method. Vibrio alginolyticus, V. cholera, V. harveyi, V. parahaemolyticus and V. vulnificus were the bacterial strains that applied in the present study. The results of the present study indicated that only leaf of C. esculenta extracted using distilled water shows antimicrobial activity against all the tested bacterial strains whereas other extractions did not possess antimicrobial property against the tested bacteria. This study revealed the huge potential of aqueous extract of C. esculenta to alternate commercial antibiotic as antimicrobial agent for aquaculture use.

Key words: Colocasia esculenta, Vibrio spp., methanol extract, aqueous extract

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