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对人咽部正常菌群细菌抑制脑膜炎奈瑟氏菌Ａ群、Ｂ群，溶血性链球菌甲型、乙型，肺炎链球菌，金黄色葡萄球菌，白喉棒状杆菌，百日咳杆菌生长进行了实验观察，结果显示对８种致病菌的生长都有抑制作用，其他菌株对８种致病菌的生长亦分别是部分抑制，表明人咽部正常菌群细菌对８种致病菌拮抗作用的多重性和非特异性。对２５株人咽部正常菌群细胞的鉴定结果表明，有粪链球菌，孪生球菌、血链球菌、米勒链球菌，缓症链球菌，分别占３２％，２０％，１６％，１６％和４％，其中粪链球菌，孪生球菌对致病菌生长有抑制作用
Neisseria meningitides group A, group B, Hemolytic streptococcus A, B, Streptococcus pneumoniae, Staphylococcus aureus, Corynebacterium diphtheriae, and Bordetella pertussis were tested for their ability to inhibit normal human pharyngeal bacteria Observation, the results showed that the growth of eight kinds of pathogenic bacteria were inhibited, and other strains of eight kinds of pathogenic bacteria were also partially inhibited the growth, indicating that normal pharyngeal bacteria on the eight kinds of pathogenic bacteria antagonistic effect Multiple and non-specific. The identification results of normal pharyngeal cells in 25 human pharynx showed that Streptococcus faecalis, Twinococcus, Streptococcus sanguis, Streptococcus Mildew and Streptococcus mitis were 32%, 20%, 16%, 16% And 4% respectively, of which Streptococcus faecalis and Twinococcus had inhibitory effects on the growth of pathogenic bacteria