Multidrug-resistant A.baumannii has spread to civilian hospitals in part due to the transport of infected soldiers through multiple medical facilities.

Author: The U.S. Army

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Acinetobacter baumannii

  • General information

    • the following information is not yet verified
      A. baumannii is part of the ACB complex (A. calcoaceticus and A. baumannii).

      Family: Moraxellaceae

      Natural habitat
      Acinetobacter species are widely distributed in nature (soil, sewage and water) and in the hospital environment.
      They are able to survive on moist and dry surfaces, and also be present in foodstuff and on the healthy human skin.

      Clinical significance
      A. baumannii is often responsible for hospital acquired infections.

      The ability of this microorganism to acquire antimicrobial multiresistance and his high capacity for survival on most environmental surfaces has led to an increase concern regarding hospital acquired infections.

      Infections like, respiratory, urinary tract, wound infections, abscesses and meningitis in debilitated humans.

  • Gram stain

    • the following information is not yet verified
      Gram negative, short, almost round, rod-shaped rods,

      0.9-1.5 x 1.5-2.5 µm,

      located often in pairs or chains of variable length.

      They are sometimes difficult to decolorize

  • Culture characteristics

    • the following information is not yet verified

      Obligate aerobic / NF

      BA colonies are gray to white, smooth and opaque, non hemolytic, 1-2 mm, center growth thicker and do not constitute pigment.

      The colonies are slightly smaller than the Enterobacteriaceae

      Colonies of encapsulated cells are generally non-pigmented and mucoid.

      McConkey colonies are pale, non lactose fermenter

      BBAØ no growth

  • Characteristics

  • References

    • James Versalovic et al.(2011) Manual of Clinical Microbiology 10th Edition

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