[Serotype distribution of Actinobacillus actinomycetemcomitans].

A total of 131 Actinobacillus actinomycetemcomitans clinical strains from 28 periodontally healthy or diseased subjects were serologically categorized by indirect enzyme-linked immnosorbent assay. Sepecies-specific and serotype b, c-specific monoclonal antibodies against Actinobacillus actinomycetemcomitans were used. Preliminary data revealed that each subject harbored only one serotype of Actinobacillus actinomycetemcomitans. The distribution of serotype a, b and c were respectively 11%, 21% and 68%, both of periodontally healthy subjects harbered serotype b, 7 of 9 juvenile periodontitis subjects harbered serotype c, 12 of the other subjects which included 3 adult periodontitis and 14 gingivitis harbered serotype c.