Acinetobacter baumannii and Acinetobacter spp.

  • Federico Perez
  • Robert A. BonomoEmail author


Acinetobacter baumannii is a bacterial pathogen increasingly identified in the clinical microbiology laboratory as a cause of infection in humans. Upon microscopic examination, A. baumannii appears as a Gram-negative coccobacillus, and it produces clear colonies when grown on MacConkey agar, indicating its inability to ferment lactose. The taxonomy of Acinetobacter genus, part of the γ subclass of the Proteobacteria phylum, is complex and currently comprises 43 species (, defined mostly by genomic DNA–DNA hybridization.


Nosocomial Average nucleotide identity (AIN) Point mutation Hypermutagenesis Point mutations Horizontal gene transfer Biofilms Lipopolysaccharide (LPS) Outer membrane vesicles (OMVs) Multidrug resistant (MDR) Polymyxins Heteroresistance 


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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Medicine and Research Services, Louis Stokes Cleveland Department of Veterans Affairs Medical CenterCase Western Reserve University School of MedicineClevelandUSA
  2. 2.Pharmacology, Molecular Biology and MicrobiologyUniversity Hospitals Case Medical CenterClevelandUSA
  3. 3.Medical Service, Louis Stokes Cleveland Department of Veteran Affairs Medical CenterUniversity Hospitals Case Medical CenterClevelandUSA
  4. 4.Vice Chair for Veteran Affairs, Department of MedicineUniversity Hospitals Case Medical CenterClevelandUSA

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