title: Incidence of Prevotella intermedia and Prevotella nigrescens in periodontal health and disease.
abstract: The incidence of black-pigmented rods (BPRs), especially Prevotella intermedia and Prevotella nigrescens, in periodontal health and disease were examined. Furthermore, the degradative enzyme activities of P. intermedia were compared among the strains from periodontal health and disease. Microbiological specimens were collected from subgingival crevice or periodontal pocket by paper point. The BPRs were found in 71.1% of periodontally healthy subjects (n=45), and in 47.1% of healthy sites (n=34) and 87.8% of active sites (n=41) among periodontally diseased patients. Porphyromonas gingivalis was detected only in active sites of periodontally diseased patients (17.8% of 180 strains). P. intermedia was the predominant BPR in both healthy and active sites (37.3 and 41.7%, respectively) of the patients. However, P. nigrescens was the predominant BPR (70.5% of 173 strains) in periodontally healthy subjects. The enzyme activities of esterase, esterase-lipase, acid-phosphatase and alpha-fucosidase of P. intermedia strains isolated from active sites in patients were significantly higher (P<0.05) than those of healthy subjects. The results suggest that P. intermedia might increase the activity of degradative enzymes under a certain condition and support the progression of periodontitis.
authors.affiliation: Department of Bacteriology, Tsurumi University School of Dental Medicine, Yokohama, Kanagawa, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Maeda
authors.forename: M
authors.initials: M
authors.lastname: Okamoto
authors.forename: K
authors.initials: K
authors.lastname: Kondo
authors.forename: H
authors.initials: H
authors.lastname: Ishikawa
authors.forename: R
authors.initials: R
authors.lastname: Osada
authors.forename: A
authors.initials: A
authors.lastname: Tsurumoto
authors.forename: H
authors.initials: H
authors.lastname: Fujita
mesh_terms: D000328:Adult; D001426:Bacterial Proteins / Q000378:metabolism; D004950:Esterases / Q000378:metabolism; D005260:Female; D016965:Gram-Negative Anaerobic Straight, Curved, and Helical Rods / Q000302:isolation & purification; D006801:Humans; D015994:Incidence; D008049:Lipase / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D010510:Periodontal Diseases / Q000453:epidemiology / Q000382:microbiology*; D010519:Periodontium / Q000382:microbiology*; D010744:Phosphoric Monoester Hydrolases / Q000378:metabolism; D016966:Porphyromonas gingivalis / Q000302:isolation & purification; D018720:Prevotella / Q000201:enzymology / Q000302:isolation & purification*; D018713:Prevotella intermedia / Q000201:enzymology / Q000302:isolation & purification*; D005644:alpha-L-Fucosidase / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; D004950:Esterases; D008049:Lipase; D010744:Phosphoric Monoester Hydrolases; D005644:alpha-L-Fucosidase