Prevotella

Prevotella
Genus of Gram-negative, nonmotile, nonsporeforming, obligately anaerobic, chemoorganotrophic, and pleomorphic rods; contains many species previously classified in the genus Bacteroides.
- P. bivia the species of P. in highest concentration in the human vaginal tract.
- P. denticola a bacterial species found in the human mouth; a cause of infections of the oral cavity and adjacent structures.
- P. disiens a bacterial species associated with human infections, primarily of the female genital tract. SYN: Bacteroides disiens.
- P. heparinolytica a bacterial species associated with human periodontal disease.
- P. intermedia a species found in gingival crevices, especially associated with gingivitis, and other oral infections.
- P. melaninogenica a species found in the mouth, feces, infections of the mouth, soft tissue, respiratory tract, urogenital tract, and intestinal tract; implicated in periodontal disease; seen in aspiration. The type species of Pretovella. SYN: Bacteroides melaninogenicus.
- P. oralis a bacterial species found in the gingival crevice of humans and in infections of the oral cavity and upper respiratory and genital tracts.
- P. oris a bacterial species isolated from the gingival crevice, systemic infections, face, neck, and chest abscesses, wound drainages, and blood and various bodily fluids.

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Pre·vo·tel·la (pre″vo-telґə) [Andrй Romain Prйvot, French microbiologist, 1894–1982] a genus of gram-negative, obligately anaerobic, moderately saccharolytic, bile-sensitive bacteria of the family Prevotellaceae, consisting of nonmotile, non–spore-forming, pleomorphic rod-shaped organisms. They are normal inhabitants of the mucous membranes and are found especially in the oral cavity, colon, and vagina; some cause human infections. Included here are a number of species formerly included in the genus Bacteroides. The type species is P. melaninogeґnica.

Medical dictionary. 2011.

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  • Prevotella bivia — a bile sensitive, nonpigmented species that is moderately fermentative, found in the female genital tract and in the oral cavity, and isolated from infections of the urogenital tract and abdominal region and from breast abscesses. Formerly called …   Medical dictionary

  • Prevotella buccae — a nonpigmented species that is a normal inhabitant of the gingival crevice and has been isolated from chest drainage, blood, sinus aspirates, and peritoneal fluid; formerly called Bacteroides buccae …   Medical dictionary

  • Prevotella corporis — a pigmented species that has been isolated from various clinical specimens; formerly called Bacteroides corporis …   Medical dictionary

  • Prevotella denticola — a pigmented species that is a normal inhabitant of the gingival crevice and has been isolated from various clinical specimens; formerly called Bacteroides denticola …   Medical dictionary

  • Prevotella disiens — a nonpigmented, weakly fermentative species found in infections of the oral cavity and the female genital tract, and as part of the normal flora of the vagina and mouth; formerly called Bacteroides disiens …   Medical dictionary

  • Prevotella heparinolytica — a nonpigmented species that has been isolated from infections of the oral cavity and respiratory tract and from the genital tract; formerly called Bacteroides heparinolyticus …   Medical dictionary

  • Prevotella intermedia — a weakly fermentative species isolated from the human gingival crevice and various clinical specimens. Formerly called Bacteroides intermedius and B. melaninogenicus subsp. intermedius …   Medical dictionary

  • Prevotella melaninogenica — a coccoid species that produces a black hematin pigment, part of the normal flora of the mucous membranes. It is also an important pathogen in oral, lung, and brain abscesses and occurs in other mixed infections. Formerly called Bacteroides… …   Medical dictionary

  • Prevotella oralis — a nonpigmented, strongly fermentative species found principally in the gingival sulcus, which is occasionally associated with infections of the oral cavity and the respiratory and genital tracts; formerly called Bacteroides oralis …   Medical dictionary

  • Prevotella oris — a nonpigmented species that is a normal inhabitant of the gingival crevice and has been isolated from systemic infections; abscesses of the face, neck, and chest; abdominal wound drainage; blood; and peritoneal and spinal fluid. Formerly called… …   Medical dictionary

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