Gram negative bacilli
Normal flora of the human gastrointestinal tract.
Can be associated with a wide variety of infections ranging from urinary tract infections to life-threatening pneumonia, liver abscesses, endophthalmitis and bacteremia.
Patients may require contact precautions in cases of extended spectrum beta-lactamase (ESBL), carbapenemase (KPC) and metallo-beta lactamases (MBL).