What is a common cause of urinary tract infection in hospitalized patients?

• A. Indwelling urinary catheter
• B. Dehydration
• C. Bacteria in urine
• D. Poor hygiene

Answer: (A)

In hospitalized patients, urinary tract infections are most often linked to indwelling urinary catheters. The catheter creates a direct route from the outside into the bladder and disrupts normal urinary flow, allowing bacteria from the skin or environment to ascend and colonize the catheter and bladder. Bacteria can form biofilms on the catheter surface, which protect them from antibiotics and the immune system, making infections more likely the longer the catheter remains in place. This is why catheter-associated infections are a major concern in hospitals.

Dehydration can predispose to infections by reducing urine flow, but it is not the primary driver of hospital-associated UTIs. Bacteria in urine simply indicates bacteriuria, which isn’t by itself an infection unless symptoms are present. Poor hygiene can contribute in some cases, but the most common hospital-associated pathway is the use of an indwelling catheter, which is why reducing unnecessary catheter use and ensuring proper catheter care are key preventive steps.