| actinobacillus actinomycetemcomitans and porphyromonas gingivalis in young chinese adults. | the aim of this study was to determine the presence or absence of actinobacillus actinomycetemcomitans and porphyromonas gingivalis in young chinese adults and to examine the a. actinomycetemcomitans isolates from positive subjects with regard to the serotype distribution, presence of the leukotoxin gene lkta and the promoter for the leukotoxin operon as well as the incidence of phage aa phi 23. sixty subjects, working in a knitting factory in the province of guangzhou, people's republic of chin ... | 1998 | 10093538 |