变形链球菌的细胞壁蛋白和多糖与细菌毒力关系密切,尤其是多糖能促进菌体对宿主的粘附,更增加了病原菌的毒力。但它的免疫原性很低,因此,必须选择恰当的免疫原,才能产生最佳的免疫效果。口腔唾液里的抗多糖免疫球蛋白主要是IgA,作者分析了IgA的反应情况。把72只大鼠分成5组,分别用下列制剂免疫:(1)80μg可溶 Streptococcus mutans cell wall proteins and polysaccharides and bacterial virulence are closely related, especially polysaccharides can promote bacterial cell adhesion to the host, but also increased the virulence of pathogens. However, its immunogenicity is very low, therefore, the proper immunogen must be selected to produce the best immune effect. Oral salivary anti-polysaccharide immunoglobulin is mainly IgA, the author analyzed the reaction of IgA. 72 rats were divided into 5 groups and each was immunized with the following preparations: (1) 80 μg soluble