Final answer:
Proteus mirabilis is a gram-negative bacterium that is motile, produces urease, and is a common cause of urinary tract infections. It is also a common inhabitant of the human gastrointestinal tract and can be an opportunistic pathogen causing hospital-acquired infections.
Step-by-step explanation:
Proteus mirabilis is a gram-negative bacterium that is motile and produces urease. It is also a common cause of urinary tract infections. Other characteristics of Proteus mirabilis include being a common inhabitant of the human gastrointestinal tract, being an opportunistic pathogen, and being associated with hospital-acquired infections. The presence of this bacterium is often detected through routine urinalysis and can be treated with antibiotics.