Microbiological profile of untreated subjects with localized aggressive periodontitis.
OBJECTIVE
The microbial profile of localized aggressive periodontitis (LAgP) has not yet been determined. Therefore, the aim of this study was to evaluate the subgingival microbial composition of LAgP.


METHODS
One hundred and twenty subjects with LAgP (n=15), generalized aggressive periodontitis (GAgP, n=25), chronic periodontitis (ChP, n=30) or periodontal health (PH, n=50) underwent clinical and microbiological assessment. Nine subgingival plaque samples were collected from each subject and analysed for their content of 38 bacterial species using checkerboard DNA-DNA hybridization.


RESULTS
Red complex and some orange complex species are the most numerous and prevalent periodontal pathogens in LAgP. The proportions of Aggregatibacter actinomycetemcomitans were elevated in shallow and intermediate pockets of LAgP subjects in comparison with those with GAgP or ChP, but not in deep sites. This species also showed a negative correlation with age and with the proportions of red complex pathogens. The host-compatible Actinomyces species were reduced in LAgP.


CONCLUSIONS
A. actinomycetemcomitans seems to be associated with the onset of LAgP, and Porphyromonas gingivalis, Tannerella forsythia, Treponema denticola, Campylobacter gracilis, Eubacterium nodatum and Prevotella intermedia play an important role in disease progression. Successful treatment of LAgP would involve a reduction in these pathogens and an increase in the Actinomyces species.
Faveri
Marcelo
M
Department of Periodontology, Dental Research Division, Guarulhos University, Guarulhos, SP, Brazil.
Figueiredo
Luciene Cristina
LC
Duarte
Poliana Mendes
PM
Mestnik
Maria Josefa
MJ
Mayer
Marcia Pinto Alves
MP
Feres
Magda
M
D000190:Actinomyces / Q000502:physiology*; D000293:Adolescent; D000328:Adult; D016976:Aggregatibacter actinomycetemcomitans / Q000502:physiology; D010520:Aggressive Periodontitis / Q000382:microbiology*; D000898:Antibiosis; D001421:Bacteria, Anaerobic / Q000502:physiology*; D016022:Case-Control Studies; D004269:DNA, Bacterial / Q000032:analysis; D003773:Dental Plaque / Q000382:microbiology*; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D009693:Nucleic Acid Hybridization; D055815:Young Adult
D004269:DNA, Bacterial