Novel salmonella bacteriophage microencapsulated microspheres and preparation method thereof

Abstract

The invention provides a preparation method of novel salmonella bacteriophage microencapsulated microspheres. The method comprises the following steps of mixing a cationic etherified starch solution and a bacteriophage suspension, and uniformly stirring to obtain a first mixed solution; uniformly stirring and mixing the first mixed solution, a sodium alginate solution, a xanthan gum solution and a nano TiO2 solution to obtain a second mixed solution; and dropwise adding the second mixed solution into a calcium chloride solution to form calcium alginate gel, filtering and collecting bacteriophage microspheres, putting the bacteriophage microspheres into a cationic chitosan oligosaccharide solution, coating for 30 minutes, and filtering and collecting the bacteriophage microencapsulated microspheres. In actual use, after the bacteriophage microspheres enter gastric juice, the bacteriophage surface coated material can effectively resist erosion of gastric acid and prolong the survival time of bacteriophage, and after the bacteriophage microspheres enter intestinal juice, the bacteriophage surface coated material can react with the intestinal juice and is cracked to release the bacteriophage in the material so as to achieve the sterilization effect. The method has the advantages that microencapsulation preparation is carried out at room temperature, the process is simple, the application range is wide, and the cost is low; and the raw materials are wide in source, cheap and easy to obtain, and the bacteriophage in the product is high in activity and encapsulation efficiency and can be directly applied to feed addition.

Description

technical field [0001] The invention belongs to the technical field of preparation of biological feed additives, and in particular relates to novel phage microencapsulated microspheres and a preparation method thereof. Background technique [0002] Phage is a type of bacterial virus that exists widely in nature. Among phages, there is a bacteriophage with strong lytic properties, which can infect or lyse bacteria, and can quickly replicate and proliferate, and finally achieve antibacterial effects. Currently, phages are used for sterilization method has been widely used. As a traditional treatment method, antibiotics still occupy a large market, but bacteriophage sterilization has many advantages that antibiotic treatment does not have, such as strong specificity, safety and non-toxicity, self-replication and widespread existence of bacteriophage, etc., so Using phage to kill bacteria is a very ideal method to replace antibiotics. Phages have a very significant effect on a...

AI Technical Summary

Problems solved by technology

Although microencapsulation technology has many advantages, it is necessary to select an appropriate microencapsulation coating material. If the screening material is inappropriate, it will not only reduce the activity of phage, but also cause a decrease in the encapsulation rate, affecting its ability to survive in the intestinal tract. The release of the channel will eventually lead to a decrease in the bactericidal effect

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