Some strains of lactic acid bacteria are found to have the ability to adhere and live in the gastro-intestinal tract, urinogenital systerm or mucosal with no contemporary immunogenicity.

• 利用某些乳酸菌可以在胃肠道、泌尿、生殖系统中或粘膜部位黏附存活且无病原性等特点，以乳酸菌作为活菌口服疫苗或粘膜疫苗载体的研究受到了研究者们广泛的重视。