Kingella species

Paul Auwaerter, M.D.
Kingella species is a topic covered in the Johns Hopkins ABX Guide.

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  • Fastidious, Gram-negative facultative anaerobic coccobacillus of Neisseriaceae family.
    • Labs may misidentify due to organism tendency for crystal violet dye retention, therefore appearing Gram-positive.
    • β-hemolytic, catalase negative; will not grow on MacConkey agar.
    • Polysaccharide capsule aids in virulence and invasive abilities.
  • Part of normal oral/respiratory and GU flora, especially in children.
    • Colonization rates:
      • 0-6 mos: 1%
      • 12 mos- 4 yrs: 10-28%, toward higher-end especially in daycare population)
      • Adults: 1%
  • Kingella kingae most frequent human pathogen.
    • Other occasional species include K. dentrificans and K. oralis.
  • Generally susceptible to many antibiotic classes.

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Last updated: March 6, 2019