Miscellaneous Organism(s)

Empiric drug regimens listed for the various bacterial strains are for ADULT patients with normal renal function. Review the relevant package insert for additional prescribing information.

Miscellaneous Organism(s) – Gram-variable-staining
>Gardnerella vaginalis


Gardnerella vaginalis:

  • Gram-variable-staining rod, facultative anaerobic bacteria (actually has a Gram-positive cell wall, but because the cell wall is so thin it can appear either Gram-positive or Gram-negative under the microscope).
  • Small (1-1.5 µm diameter) non-spore forming, non-motile coccobacilli.
  • Previously classified as Haemophilus vaginalis and afterwards as Corynebacterium vaginalis.
  • Growth: grows as small, circular, convex, gray colonies on chocolate agar; it also grows on HBT agar.
  • Can cause bacterial vaginosis in some women as a result of a disruption in the normal vaginal microflora.
  • Typically isolated in genital cultures.  May also be detected in other samples from blood, urine, and pharynx.


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