Fusobacterium

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The page below is a sample from the LabCE course Medically Important Anaerobes. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Fusobacterium

Significant Fusobacterium species include:
  • F. mortiferum
  • F. necrophorum
  • F. nucleatum
  • F. varium
  • F. ulcerans
Things to remember:
  • Often found in mixed infections. Fusobacterium spp. may prove difficult to isolate. The Gram stain will help in cases of F. nucleatum as these bacteria may appear long and slender, with tapered ends.
  • Fusobacterium spp. infections are often associated with oral, pulmonary, and intracranial infections; they are frequently found in specimens from abscesses, such as obstetric, gynecologic, blood, and wounds.
Figure 26. Centers for Disease Control and Prevention. (1972). Fusobacterium nucleatum, which had been cultured on blood agar medium and incubated for a 48-hour time period. [Image]. https://phil.cdc.gov/Details.aspx?pid=2968.

Figure 26. Gram stain of Fusobacterium nucleatum