لاکتوکوکوس نوترکيب :رهيافتي نوين براي دستيابي به واکسن هاي دهاني.

Background and Aim: The genus of Lactococcus lactis belonging to the lactic acid bacteria (LAB) group, is a gram positive, faculative anaerobic, non-spore forming and non-motile bacterium. The aims of this paper are to introduce Lactic acid bacteria especially non-pathogenic, non-invasive and safe Lactococcus lactis, to study the previous studies and to investigate the advantages, limitations, promotion methods and future prospects of oral vaccine based on this bacterium as a promising strategy for vaccine production and prevention of some infectious diseases. Materials and Methods: In this review article, 62 articles related to Lactococcus lactis and its application in producing oral vaccines were collected via data bases such as PubMed, Google Scholar, Scopus since 1981-2020. Findings: Lactococcus lactis, as a safe microorganism (GRAS) widely used in the food industry. Live recombinant Lactococcus lactis as a "biologic drug" is orally administered as one of the live vaccines expressing viral and bacterial antigens. Conclusion: Recombinant Lactococcus-based vector can be suitable substitutes for live attenuated vaccines and can be considered as a safe and food-grade host for producing the desired products of human consumption over other systems. It also has a high potential for vaccine delivery, especially through mucosal methods to prevent or treat certain diseases. [ABSTRACT FROM AUTHOR]