Johns Hopkins Antibiotic (ABX) Guide

Acinetobacter baumannii

MICROBIOLOGY

  • Aerobic gram-negative coccobacillus or rod, often mistaken for Neisseria or Moraxella on Gram stain.
  • Common in environment (water, soil) and hospital (catheters, lotions, ventilation equipment).
  • Grows on standard agar media.
  • A. baumannii is the major species of Acinetobacter.
    • Occasional other species include: A. calcoaceticus, A. lwoffi, A. junii, A. johnsonii and A. baylyi.
    • Low grade pathogen affecting compromised hosts (immunosuppression, post-surgical, ventilator-associated pneumonia, burn wounds, ICU pts, device-associated infections and malnutrition).

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