Final answer:
Most urinary tract infections (UTIs) are caused by the gram-negative bacterium Escherichia coli, and good hygiene along with antibiotics are key in their treatment.
Step-by-step explanation:
The primary bacterium responsible for most urinary tract infections (UTIs) is Escherichia coli. This gram-negative bacterium is commonly found in the lower gastrointestinal tract and can cause infections when introduced into the urinary tract, which includes the urethra and bladder. UTIs are frequently treated with antibiotics such as ciprofloxacin, which are prescribed after a urine culture is analyzed for the presence of white blood cells, red blood cells, and bacteria. Good hygiene and proper bladder emptying practices can reduce the risk of UTIs, which are much more common in women due to the shorter urethra and its proximity to the anus.