Most lactic acid bacteria ( lab ) are commonly considered as safe probiotics . some strains of lactic acid bacteria are found to have the ability to adhere and live in the gastro - intestinal tract , urinogenital system or mucosa with no contemporary immunogenicity . importance is widely attached to the research of the lab as live oral and mucosal vaccine 大部分乳酸菌是普遍认为安全的益生菌，利用一些乳酸菌可以在胃肠道、泌尿、生殖系统中或粘膜部位粘附存活且无病原性等特点，开展乳酸菌作为活菌口服疫苗或粘膜疫苗载体的研究受到了广泛的重视。
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