Strain of snakehead-derived bacillus velezensis and application thereof

Abstract

The invention discloses bacillus velezensis and an application of the bacillus velezensis in aquaculture. The bacillus velezensis WLYS23 strain is preserved in the Guangdong Microbial Culture Collection Center, and the preservation number of the bacillus velezensis WLYS23 strain is GDMCC No: 60890. The bacillus velezensis disclosed by the invention is separated from healthy hybrid snakehead, is an endogenous strain, and has a relatively strong antagonistic effect on seven aquatic animal pathogenic bacteria, namely aeromonas salvii, aeromonas simplex, aeromonas hydrophila, aeromonas veronii, aeromonas hydrogassum, plesiomonas shigelloides and nocardia seriolae.

Description

technical field

[0001] The invention belongs to the field of microbes, and in particular relates to a strain of Bacillus velez from a snakehead and an application thereof. Background technique

[0002] China is the world's largest producer and consumer of aquatic products. With the high degree of intensification of aquaculture, the deterioration of the aquatic ecological environment has become increasingly prominent, and aquatic animal diseases are on the verge of occurrence. According to statistics, the annual loss due to diseases in my country reaches 15 billion yuan. Among them, the common bacterial pathogens in the process of aquaculture mainly include Aeromonas victoria, Aeromonas hydrophila, Vibrio harveii, Vibrio alginolyticus, Streptococcus agalactiae, Nocardia spp. Edwardsiella, etc. These pathogenic bacteria are widely spread and prevalent in aquaculture animals in my country, often causing large-scale outbreaks of diseases related to aquatic economic animals. [0...

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