<unk>  is a typically short, almost round, rod-shaped (coccobacillus) Gram-negative bacterium. It is named after the bacteriologist Paul Baumann. It can be an opportunistic pathogen in humans, affecting people with compromised immune systems, and is becoming increasingly important as a hospital-derived (nosocomial) infection. While other species of the genus<unk>  are often found in soil samples (leading to the common misconception that<unk>  is a soil organism, too), it is almost exclusively isolated from hospital environments. Although occasionally it has been found in environmental soil and water samples, its natural habitat is still not known. Bacteria of this genus lack flagella, whip-like structures many bacteria use for locomotion, but exhibit twitching or swarming motility. This may be due to the activity of type IV pili, pole-like structures that can be extended and retracted. Motility in<unk>  may also be due to the excretion of exopolysaccharide, creating a film of high-molecular-weight sugar chains behind the bacterium to move forward. Clinical microbiologists typically differentiate members of the genus<unk>  from other Moraxellaceae by performing an oxidase test, as<unk>  spp. are the only members of the Moraxellaceae to lack cytochrome c oxidases.<unk>  is part of the ACB complex <unk> , A. calcoaceticus, and<unk>  genomic species 13TU). It is difficult to determine the specific species of members of the ACB complex and they comprise the most clinically relevant members of the genus.<unk>  has also been identified as an ESKAPE pathogen (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae,<unk> , Pseudomonas aeruginosa, and Enterobacter species), a group of pathogens with a high rate of antibiotic resistance that are responsible for the majority of nosocomial infections. Colloquially,<unk>  is referred to as "Iraqibacter" due to its seemingly sudden emergence in military treatment facilities during the Iraq War. It has continued to be an issue for veterans and soldiers who served in Iraq and Afghanistan. Multidrug-resistant<unk>  has spread to civilian hospitals in part due to the transport of infected soldiers through multiple medical facilities. During the COVID-19 pandemic, coinfection with<unk>  secondary to SARS-CoV-2 infections has been reported multiple times in literature.
Acinetobacter baumannii
Pseudomonas aeruginosa
Enterobacter cloacae
Bacillus anthracis
Legionella clemsonensis
Streptococcus bovis
Escherichia coli
Klebsiella oxytoca