[Prevalence of Actinobacillus actinomycetemcomitans in saliva of different types of periodontitis].
OBJECTIVE
To investigate the prevalence of Actinobacillus actinomycetemcomitans (Aa) in whole saliva of different types of periodontitis and compare the detections of Aa between saliva and pooled subgingival plaque sample, and analyze the relationship between Aa and clinical conditions.


METHODS
Unstimulated whole saliva samples and pooled subgingival samples were collected from 50 aggressive periodontitis (AgP) patients, 48 chronic periodontitis (CP) patients and 25 subjects with no periodontitis, and Aa was detected in these samples by PCR method.


RESULTS
The prevalence of Aa in whole saliva of AgP patients was significantly higher than in subjects with no periodontitis (32% vs. 4%, P<0.01) and CP patients (32% vs. 15%, P<0.05). Aa was also more frequently detected in whole saliva sample than in pooled subgingival sample of AgP patients (32% vs. 16%, P<0.05). Subjects younger than 30 years old were more likely to present Aa in whole saliva ( OR = 3.23, P<0.05) and percentage of sites with bleeding index (BI) > or = 3 over 70% was a risk indicator for the presence of Aa in whole saliva


CONCLUSIONS
The detection of Aa in whole saliva sample of AgP patients was more frequent than in pooled subgingival plaque samples, and also more frequent than in CP patients and subjects with no periodontitis, which suggest that Aa may participate in the initiation and progression of aggressive periodontitis.
Feng
Xiang-hui
XH
Department of Periodontology, Peking University School and Hospital of Stomatology, Beijing 100081, China.
Zhang
Li
L
Meng
Huan-xin
HX
Xu
Li
L
Chen
Zhi-bin
ZB
Shi
Dong
D
D000328:Adult; D016976:Aggregatibacter actinomycetemcomitans / Q000302:isolation & purification*; D055113:Chronic Periodontitis / Q000382:microbiology*; D003773:Dental Plaque / Q000382:microbiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010518:Periodontitis / Q000382:microbiology; D012463:Saliva / Q000382:microbiology*; D055815:Young Adult