Bacterial liquid compound for assisting in improving in-vitro bacterial infection of fishes and application of bacterial liquid compound

Abstract

The invention discloses a bacterial liquid compound for assisting in improving in-vitro bacterial infection of fishes, which comprises the following components in mass-volume ratio: 178.5-258.0 g / L of polyhydroxyalkanoate PHA (polyhydroxyalkanoate); 1.5-2.5 g / L of a nitrogen source; and the balance of essential elements for survival of other microorganisms. Polyhydroxyalkanoate PHA of a specific variety and a specific compounding mass ratio is compounded with a nitrogen source of a specific mass-volume ratio and other necessary elements for survival of microorganisms, all the components are synergistically matched to prepare the bacterial liquid compound, the bacterial liquid compound is applied to the in-vitro bacterial infection process of fishes, and the in-vitro bacterial infection rate of the fishes is increased. The antagonism among different types of microorganisms is adopted, the antagonism on harmful bacteria infected in vitro by fishes is relatively strong, and the harmful bacteria infected in vitro by the fishes can be effectively killed, so that the shelf life of the bacterial liquid compound is effectively prolonged; in addition, no antibiotics enter fish bodies, so that the risk of drug residues is avoided, and the fish health is effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a bacterial liquid compound used to assist in improving bacterial infection in vitro of fish and its application. Background technique [0002] Antagonism refers to the effect of one type of microorganisms inhibiting or killing other types of microorganisms. Antagonism is a common phenomenon in the microbial world. Antagonism between microorganisms can be divided into non-specific antagonism and specific antagonism. Antibiotic-producing microorganisms can inhibit or even kill other types of microorganisms. For example, penicillin produced by Penicillium can inhibit Gram-positive bacteria, and nystatin produced by Streptomyces can inhibit yeast and mold. These are all specific. Antagonism. [0003] At present, the main method of treating bacterial infection in vitro is to use antibiotics to feed or soak the body with antibiotic liquid, but these two methods will leave a lar...

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Problems solved by technology

[0004] In order to overcome that the metabolic cycle of antibiotics in the body in the prior art is much longer than the breeding cycle of aquatic fish, unscrupulous merchants will market aquatic products with antibiotic residues, which will easily cause technical problems in food safety. The primary purpose of the present invention is to In providing a bacterial liquid complex for assisting in improving bacterial infection in vitro of fish

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