Antimicrobial activity of agricultural by-products extracts against Vibrio spp.
Charoenrak S., Boonprasop S., Sutthirak P., Wongmongkol N.
Author Affiliation: Faculty of Science and Industrial Technology, Prince of Songkla University, Suratthani Campus, Muang, Suratthani 84000, Thailand.
Thai Journal of Agricultural Science 44 : 200-203
Abstract : Agricultural by-products are residues from the utilization of agriculture materials, i.e., generic peels and seeds. The extractions of the by-products could inhibit foodborne pathogens. This work aimed to study the inhibitory effect of six agricultural by-products extracts (pomegranate peels, mango seeds, rambutan peels, rambutan seeds, mangosteen peels and longkong peels) against Vibrio parahaemolyticus and V. vulnificus. The by-products were extracted with either water or 95% ethanol. It was found that the pomegranate peels extracted by soaking in 95% ethanol for 6 hours was the best condition to inhibit V. parahaemolyticus and V. vulnificus and the MIC (minimum inhibitory concentration) was 2.5 and 2.3 mg/mL, respectively. Meanwhile, the mango seeds extracted by soaking in 95% ethanol for 12 hours showed the best condition to inhibit V. vulnificus with the MIC at 4.1 mg/mL. Hence, the agricultural by-product extracts could be used to replace the antibiotics, resulting in the reduction of antibiotic resistance and safety for consumers. Moreover, this would be another way to make the highest utilization of agricultural by-products.