Prevotella nigrescens

Prevotella nigrescens is a species of bacterium.[1] Prevotella nigrescens has a gram negative gram stain. When P. nigrescens microflora colonize they trigger an over-aggressive response from the immune system and increase the incidence of many diseases and infections. One specific type of bacteria that is part of the normal oral flora but leads to disease when it infects the local tissue. This bacteria has no means of motility and has a Bacilli (rod) shape. Prevotella species are part of the human oral and vaginal flora. They play a role in the pathogenesis of periodontal disease,[2] gingivitis, and extraoral infections such as nasopharyngeal and intra-abdominal infections also some odontogenic infections,[3] and strains are usually carried in families, in so-called intrafamilial carriage.[4] It is also associated with carotid atherosclerosis.[3]

Prevotella nigrescens
Scientific classification
Kingdom:
Bacteria
Phylum:
Bacteroidetes
Class:
Bacteroidetes
Order:
Bacteroidales
Family:
Bacteroidaceae
Genus:
Prevotella
Species:
P. nigrescens
Binomial name
Prevotella nigrescens
Shah & Gharbia, 1992

References
  1. Shah, H. N.; Gharbia, S. E. (1992). "Biochemical and Chemical Studies on Strains Designated Prevotella intermedia and Proposal of a New Pigmented Species, Prevotella nigrescens sp. nov". International Journal of Systematic Bacteriology. 42 (4): 542–546. doi:10.1099/00207713-42-4-542. ISSN 0020-7713. PMID 1390107.
  2. Stingu, Catalina-Suzana; Schaumann, Reiner; Jentsch, Holger; Eschrich, Klaus; Brosteanu, Oana; Rodloff, Arne C. (2013). "Association of periodontitis with increased colonization by Prevotella nigrescens". Journal of Investigative and Clinical Dentistry. 4 (1): 20–25. doi:10.1111/j.2041-1626.2012.00129.x. ISSN 2041-1618. PMID 22767485.
  3. Yakob, M.; Söder, B.; Meurman, J. H.; Jogestrand, T.; Nowak, J.; Söder, P.-Ö. (2011). "Prevotella nigrescens and Porphyromonas gingivalis are associated with signs of carotid atherosclerosis in subjects with and without periodontitis". Journal of Periodontal Research. 46 (6): 749–755. doi:10.1111/j.1600-0765.2011.01398.x. ISSN 0022-3484. PMID 21793826.
  4. Fukui K, Kato N, Kato H, Watanabe K, Tatematsu N (October 1999). "Incidence of Prevotella intermedia and Prevotella nigrescens carriage among family members with subclinical periodontal disease". Journal of Clinical Microbiology. 37 (10): 3141–5. doi:10.1128/JCM.37.10.3141-3145.1999. PMC 85513. PMID 10488167. Retrieved 2013-06-12.

Further reading
  • Species clustering: Kuhnert, P. (2002). "Phylogenetic analysis of Prevotella nigrescens, Prevotella intermedia and Porphyromonas gingivalis clinical strains reveals a clear species clustering". International Journal of Systematic and Evolutionary Microbiology. 52 (4): 1391–1395. doi:10.1099/ijs.0.02021-0. ISSN 1466-5026. PMID 12148655.


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