Abstract
We reported that bacteria in dental plaque were arrested to penetrate into periodontal tissue by secretory IgA coating to the bacteria. It was clarified wheather some bacteria were coated by non-specific secretory IgA or not by a indirect fluorescence antibody technique in this study.
Staphylococcus aureus, Fusobacterium nucleatum and Candida albicans showed intensive fluorescence on their cell walls. These fluorescence indicated that they possesed the function of binding to secretory IgA. Streptococcus mutans, Streptococcus sanguis, Actinomyces viscosus and Actinomyces naeslundii showed small granular and scattered fluorescence on their cell walls. It was suggested that their binding function were lower than above three species from this observation. Specific fluorescence was not demonstrated on Staphylococcus epidermidis and Treponema macrodentium.
