天然免疫系统作为宿主第一道防线 ,主要在获得性免疫系统被活化前发挥抗感染作用 ,它依赖胚系基因编码的识别系统对病原微生物起反应。其主要作用方式是通过产生抗菌肽或蛋白以及吞噬作用直接破坏入侵的病原体 ,并判定病原体入侵部位和强度 ,调控获得性免疫反应。新近实验资料 As the host’s first line of defense, the natural immune system plays an important anti-infective role before the adaptive immune system is activated. It relies on the identification system encoded by the germline gene to react to pathogenic microorganisms. Its main mode of action is through the production of antimicrobial peptides or proteins and phagocytosis directly destroy the invasion of pathogens, and determine the invasion of pathogens and site strength, regulate adaptive immune response. Recent experimental data