Obligate anaerobes

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Anaerobes

Microbiology

  • Colonizes skin and mucosal surfaces
  • Difficult to grow

Organisms

  • Gram-negative
    • Bacilli
      • Bacteroides spp.
        • B. fragilis group: B. fragilis, B. thetaiotaomicron, B. distasonis, B. vulgatus, B. ovatus, B. uniformis
        • Other Bacteroides spp.: B. gracilis, B. ureolyticus, Bilophila wadsworthia, Sutterella spp
      • Prevotella spp.
        • Pigmented: P. melaninogenica, P. intermedia, P. denticola, P. loescheii, P. corporis, P. nigrescens
        • Non-pigmented: P. oris, P. buccae, P. oralis group (P. oralis, P. buccalis, P. veroralis), P. bivia, P. disiens
      • Porphyromonas spp.: P. asaccharolytica, P. gingivalis, P. endodontalis
      • Fusobacterium spp.: F. nucleatum, F. necrophorum, F. gonidiaformans, F. naviforme, F. mortiferum, F. verium
      • Bilophila spp.
      • Sutterella spp.
    • Cocci
      • Veillonella spp.
  • Gram-positive
    • Cocci
      • Peptostreptococcus spp.: P. magnus, P. asaccharolyticus, P. prevotii, P. intermedius, P. anaerobius, P. micros
    • Bacilli (spore-forming)
      • Clostridium spp.: C. perfringens, C. ramosum, C. septicum, C. novyi, C. histolytica, C. sporogenes, C. difficile, C. bifermentans, C. butyricum, C. innocuum, C. sordellii, C. botulinum, C. tetani
    • Bacilli (non-spore-forming)
      • Propionibacterium spp.: P. acnes, P. propionicum, P. granulosum
      • Eubacterium tentum
      • Bifidobacterium spp.: B. eriksonii, B. dentium
      • Actinomyces spp.: A. israelii, A. naestundii, A. viscosus, A. odontolyticus, A. meyerii

Further Reading

  • Brook I. [Spectrum and treatment of anaerobic infections](http://dx.doi.org/10.1016/ j.jiac.2015.10.010). J Infect Chemother (2015).