Acinetobacter baumannii

Acinetobacter baumannii is a species of pathogenic bacteria, referred to as an aerobic gram negative bacterium, that is resistant to most antibiotics. As a result of its resistance to drug treatment, some estimates state the disease is killing tens of thousands of U.S. hospital patients each year, and specialists say "they could emerge as a bigger threat.^" The illness can cause severe pneumonia and infections of the urinary tract, bloodstream and other parts of the body.
A. baumannii forms  opportunistic infectionThere have been many reports of A. baumannii infections among American soldiers wounded in iraq, earning it the nickname "Iraqibacter^" Multidrug-resistant Acinetobacter baumannii is abbreviated as MDRAB

Acinetobacter baumannii is the most relevant human pathogen within the Acinetobacter genus. Most A. baumannii isolates are multiresistant, containing in their genome small, isolated islands of alien (meaning transmitted genetically from other organisms) DNA and other cytological and genetic material; this has led to more virulence. Although Acinetobacter have no flagellum; the name is Greek for "motionless". they do exhibit 'twitching' or 'gliding' motility. During growth, they are rod-shaped, and up to 2.5 microns. During the stationary phase, they become shorter and rounder, resembling small cocci as they shrink to roughly half their size. They can be found in pairs or groups. One of the tests that distinguish them from other pathogens is that they are oxidase-negative.

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source : WIKIPEDIA