<i>Bdelovibrio</i> BL1 có khả năng làm tan <i>Vibrio Campbellii</i> phát sáng phân lập từ tôm post nuôi

Abstract

    Luminous disease is one of the diseases causing serious damage to the shrimp farming industry, especially in the larval stage. The disease is caused by luminous bacteria, most commonly the group of bacteria Vibrios spp, in which luminous Vibrio campbellii can cause serious mortality in shrimp. The study isolated 15 luminous strains from postlarvae cultured in Khanh Hoa, Ninh Thuan and Binh Thuan. In which, there are 3 strains of luminous V. campbellii (called V1, V5 and V6) identified by a pair of primers specifically amplifying the toxR gene for V. campbellii. In addition, strain BALOs BL1 was isolated from the intestines of healthy white-leg shrimp identified as belonging to the genus Bdellovibrionaceae. After testing, BL1 was able to dissolve strains V1 and V6 in liquid media after 21 days and on double-layer agar plates after 7 days. But strain BL1 did not dissolve strain V5. Research’s results show the possibility of applying strains of BALOs in controlling pathogenic bacteria in aquaculture.