Potential of Chinese chive oil as a natural antimicrobial for controlling <Emphasis Type="Italic">Flavobacterium columnare</Emphasis> infection in Nile tilapia <Emphasis Type="Italic">Oreochromis niloticus</Emphasis> |
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| Authors: | Pongsak Rattanachaikunsopon Parichat Phumkhachorn |
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| Institution: | (1) Department of Biological Science, Faculty of Science, Ubon Ratchathani University, Warin Chamrap, Ubon Ratchathani, 34190, Thailand |
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| Abstract: | Chinese chive Allium tuberosum oil was studied for its diallyl sulfide content and its antimicrobial activity against Flavobacterium columnare in fish both in vitro and. The oil was found to have a very low concentration of diallyl monosulfide relative to the other
diallyl sulfides (diallyl disulfide, diallyl trisulfide, and diallyl tetrasulfide) identified. In the in vitro study, the
Chinese chive oil had a bacteriocidal effect on all tested strains of F. columnare, with varied minimal inhibitory concentrations. The median lethal dose (LD50) of FC4 for Nile tilapia Oreochromis niloticus was determined to be 3.72 × 103 CFU/fish. In the in vivo trial, no mortality was observed in fish fed fish diets supplemented with 800 mg/kg Chinese chive
oil and 100 mg/kg of oxytetracycline hydrochloride 5 days prior to infection with F. columnare strain 4 at a LD50. These results indicate that Chinese chive oil has the potential to replace antibiotics for controlling fish disease caused
by F. columnare. |
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