Compound bacterium preparation and application thereof

Abstract

The invention aims to provide a compound bacterium preparation and an application thereof. The compound bacterium preparation is a compound strain preparation which is derived from bacillus licheniformis, bacillus pumilus and bacillus subtilis in digestive tracts of prawns, wherein the bacterial strains are combined for use so that the immune level of cells and body fluid of the prawns can be enhanced; in particular, the anti-virus infection capability of the prawns can be improved. The compound bacterium preparation comprises bacillus licheniformis LV005 strains, bacillus pumilus LV012 strains and bacillus subtilis LV023 strains. The strains of the compound bacterium preparation are screened from the digestive tracts of the prawns, so that the compound bacterium preparation has the effects of improving composition and number of dominant bacterial communities of the digestive tracts of the prawns, forming and retaining good microecological balance of the digestive tracts, resisting adhesion and proliferation of viruses in the digestive tracts by competition for nutrients, competition for space or secretion of bacteriocin, improving non-specific immunity functions of the prawns by improving the activity of relevant immunoenzymes such as lysozyme and catalase of the prawns, and reducing the probability of virus infection.

Description

technical field [0001] The invention belongs to the technical field of screening and preparation of probiotics, and in particular relates to a compound bacteria preparation and its application. Background technique [0002] Human beings are faced with three major problems of population, resources and environment, and the development and utilization of the ocean has become the national strategy of coastal countries. With the sharp decline of marine fishing resources, mariculture has become the main measure generally adopted by the international community to meet the increasing protein demand of human beings. The development of sustainable aquaculture has become a topic of common concern in the world, and aquaculture products have been widely recognized and affirmed by the international community as a source of high-quality protein. As a major producer of aquatic products in the world, China's total aquaculture production accounts for more than 70% of the world's total output...

AI Technical Summary

Problems solved by technology

However, there are few Bacillus strains used in the production of prawn farming at present, and there are deficiencies such as mediocre biological properties, low number of viable bacteria, and unstable effects, especially the application of anti-prawn virus disease strains.

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