모노퍼설페이트 화합물의 Vibrio harveyi에 대한 살균력 및 횐다리새우(Litopenaeus vannamei)에서의 독성
Bactericidal Efficacy of a Monopersulfate Compound against Vibrio harveyi and Toxicity to Litopenaeus vannamei
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초록
Vibrio harveyi is one of the most serious pathogens causing vibriosis in larval and grow-out shrimp culture. This study was performed to investigate the bactericidal effect of a monopersulfate compound against V. harveyi and its toxicity in Litopenaeus vannamei. The monopersulfate compound was prepared at 0, 0.15, 0.3, 0.6, 1.2, and 2.4 ppm for the bactericidal efficacy study, and then V. harveyi was added at a rate of 1×106 CFU/mL. Subsequently, five shrimps/dose were added to the water bath. The other groups of shrimp were exposed to monopersulfate, but not to the bacterium. None of the shrimps exposed to any of the monopersulfate treatment doses without bacteria died, and no changes in their movement were detected for 7 days. However, shrimps exposed to bacteria without monopersulfate showed decreased movement and lethargy, but no death. The total number of other bacteria and V. harveyi at the different concentrations decreased significantly by 4-6 log values compared to that in the bacterial control group. The monopersulfate compound completely inhibited V. harveyi growth beginning 1 h after exposure to 2.4 ppm. These results show that the monopersulfate compound is an efficient disinfectant against naturally occurring marine bacteria and V. harveyi without being toxic to shrimp.
Abstract
Vibrio harveyi is one of the most serious pathogens causing vibriosis in larval and grow-out shrimp culture. This study was performed to investigate the bactericidal effect of a monopersulfate compound against V. harveyi and its toxicity in Litopenaeus vannamei. The monopersulfate compound was prepared at 0, 0.15, 0.3, 0.6, 1.2, and 2.4 ppm for the bactericidal efficacy study, and then V. harveyi was added at a rate of 1×106 CFU/mL. Subsequently, five shrimps/dose were added to the water bath. The other groups of shrimp were exposed to monopersulfate, but not to the bacterium. None of the shrimps exposed to any of the monopersulfate treatment doses without bacteria died, and no changes in their movement were detected for 7 days. However, shrimps exposed to bacteria without monopersulfate showed decreased movement and lethargy, but no death. The total number of other bacteria and V. harveyi at the different concentrations decreased significantly by 4-6 log values compared to that in the bacterial control group. The monopersulfate compound completely inhibited V. harveyi growth beginning 1 h after exposure to 2.4 ppm. These results show that the monopersulfate compound is an efficient disinfectant against naturally occurring marine bacteria and V. harveyi without being toxic to shrimp.
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