Bacillus amyloliquefaciens and its bacterial depressant and use

Abstract

The invention relates to Bacillus amyloliquefaciens V4. The Bacillus amyloliquefaciens V4 is preserved in the China general microbiological culture collection center and has a preservation number of CGMCC NO. 10149. The Bacillus amyloliquefaciens V4 strain and / or microbial agent can produce bacteriocin for antagonizing vibrio pathogens and pathogenic aeromonas at seedling growing and culture temperatures of common culture water, inhibit vibrio vulnificus, vibrio natriegen, vibrio harveyi, black sea vibrio, aeromonas hydrophila and aeromonas salmonicida growth and breeding, effectively control aquatic animal infectious disease generation and propagating caused by vibrio pathogens and pathogenic aeromonas, reduce aquatic animal mortality and a forage coefficient and promote aquatic animal weight gain.

Description

technical field [0001] The invention belongs to the field of microorganisms, and more specifically relates to a strain of bacillus amyloliquefaciens, a bacteriostatic agent prepared therefrom and uses thereof. Background technique [0002] my country is a big aquaculture country in the world, with an annual aquaculture output of more than 50 million tons, accounting for 71% of the world's total output. However, the loss of output caused by aquatic diseases accounts for more than 15% every year, and the economic loss is as high as 150 billion yuan. There are more than 100 known aquaculture diseases and more than 300 pathogenic species, of which bacterial pathogenic species account for 54.9%. Pathogenic Vibrio and Aeromonas salmonicida are the most important pathogenic bacteria in infectious diseases of aquatic animals. The disease caused by Vibrio has a wide epidemic area and a high incidence rate, which has caused great harm to the aquaculture industry. Vibrio anguillarum...

AI Technical Summary

Problems solved by technology

Although the use of antibiotics can effectively control the occurrence and spread of farmed animal diseases, there are blind use and drug abuse in actual production, and the abuse of antibiotics in aquaculture has many negative effects

First, the blind use of antibiotics seriously interferes with the normal growth and reproduction of beneficial microorganisms in the breeding environment and the intestinal tract of aquatic animals, destroying the microecological balance

Second, in aquaculture, the long-term large-scale and irregular use of antibiotics leads to the susceptibility of aquatic animals to pathogenic microorganisms, and more seriously, it leads to the enhancement of drug resistance of pathogenic bacteria, and the emergence of a large number of drug-resistant bacteria and even superbugs

Third, the use of antibiotics will also lead to their residues and accumulation in aquatic animals, which will eventually endanger human health

Although the residual amount of antibiotics in aquatic products is very low, the potential harm to human health is very serious and has far-reaching effects

Fourth, antibiotic drug residues also cause the quality of aquatic products to decrease, which has become a limiting factor in the sales and export volume of aquatic products

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