Porphyromonas gingivalis
Scientific classification
Kingdom:	Bacteria
Phylum:	Bacteroidetes
Class:	Bacteroidia
Order:	Bacteroidales
Family:	Porphyromonadaceae
Genus:	Porphyromonas
Species:	gingivalis

Porphyromonas gingivalis belongs to the genus Bacteroides and is a non-motile, gram-negative, rod-shaped, anaerobic pathogenic bacterium. It forms black colonies on blood agar.

It is found in the oral cavity, where it is implicated in certain forms of periodontal disease,^[1] as well as the upper gastrointestinal tract, respiratory tract, and in the colon. Collagen degradation that is observed in Chronic Periodontal Disease results in part from the collagenase enzymes of this species.

In patients harbouring porphyromonas gingivalis one finds high levels of specific antibody in the serum.

[edit] References

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v • d • e Periodontology Tissues of the periodontium and their physiologic entities Alveolar bone · Biologic width · Bundle bone · Cementum · Free gingival margin · Gingiva · Gingival fibers · Gingival sulcus · Junctional epithelium · Mucogingival junction · Periodontal ligament · Sulcular epithelium · Stippling Diagnoses Chronic periodontitis · Localized aggressive periodontitis · Generalized aggressive periodontitis · Periodontitis as a manifestation of systemic disease · Necrotizing periodontal diseases · Abscesses of the periodontium · Combined periodontic-endodontic lesions Pathogenesis A. actinomycetemcomitans · B. forsythus · Capnocytophaga sp. · F. nucleatum · P. gingivalis · P. intermedia · T. denticola Pathologic entities Calculus · Edentulism · Fremitus · Furcation defect · Gingival enlargement · Gingival pocket · Gingivitis · Horizontal bony defect · Linear gingival erythema · Occlusal trauma · Periodontal pocket · Periodontal disease · Periodontitis · Plaque · Recession · Vertical bony defect Diagnosis, treatment planning, prevention and chemotherapeutic agents Brushing · Bleeding on probing · Chlorhexidine gluconate · Enamel matrix derivative · Flossing · Hydrogen peroxide · Mouthwash · Oral hygiene · Tetracycline · Triclosan Periodontal armamentarium Curette · Membrane · Probe · Scaler Conventional therapy Debridement · Scaling and root planing Surgical therapy and periodontal surgery Apically positioned flap · Bone graft · Coronally positioned flap · Crown lengthening · Open flap debridement · Free gingival graft · Gingivectomy · Guided bone regeneration · Guided tissue regeneration · Implant Placement · Lateral pedicle graft · Pocket reduction surgery · Sinus lift · Subepithelial connective tissue graft Important personalities Per-Ingvar Brånemark · Jan Lindhe · Willoughby D. Miller · Carl E. Misch · John Mankey Riggs · Dennis P. Tarnow · James Leon Williams · W. J. Younger Other specialties Endodontology · Orthodontology · Prosthodontology

v • d • e Infectious diseases · Bacterial diseases: non-proteobacterial G- (primarily A00-A79, 001-041,080-109) Spirochaete Spirochaetaceae Treponema Treponema pallidum (Syphilis/Bejel, Yaws) · Treponema carateum (Pinta) · Treponema denticola Borrelia Borrelia recurrentis (Relapsing fever) · Borrelia burgdorferi (Lyme disease, Erythema chronicum migrans, Neuroborreliosis) Leptospiraceae Leptospira Leptospira interrogans (Leptospirosis) Spirillaceae Spirillum Spirillum minus (Rat-bite fever/Sodoku) Chlamydiae Chlamydophila Chlamydophila psittaci (Psittacosis) · Chlamydophila pneumoniae Chlamydia Chlamydia trachomatis (Chlamydia, Lymphogranuloma venereum, Trachoma) Bacteroidetes Bacteroides fragilis · Capnocytophaga canimorsus · Porphyromonas gingivalis · Prevotella intermedia · Bacteroides forsythus Fusobacteria Fusobacterium necrophorum (Lemierre's syndrome) · Fusobacterium nucleatum · Fusobacterium polymorphum