What is the primary purpose of urine culture and sensitivity (C&S) testing?

What is the primary purpose of urine culture and sensitivity (C&S) testing?

• A. Measure urine sugar levels.
• B. Identify bacteria causing infection and determine the most effective antibiotic.
• C. Assess kidney function by measuring creatinine clearance.
• D. Visualize the urinary tract with imaging.

Answer: (B)

Urine culture and sensitivity testing aims to identify the bacteria causing a urinary tract infection and determine which antibiotic will most effectively treat it. The culture part grows any bacteria in the urine so the organism can be identified, while the sensitivity testing shows which antibiotics will inhibit that specific organism’s growth. This combination guides targeted therapy, improving cure rates and reducing unnecessary broad-spectrum antibiotic use and resistance. It’s not used to measure urine sugar levels, assess kidney function, or image the urinary tract. In practice, clinicians may start empiric treatment based on symptoms and guidelines, but C&S is particularly helpful for complicated cases, recurrent infections, pregnancy, catheter-associated infections, or treatment failure to tailor the antibiotic choice.

Urine culture and sensitivity testing aims to identify the bacteria causing a urinary tract infection and determine which antibiotic will most effectively treat it. The culture part grows any bacteria in the urine so the organism can be identified, while the sensitivity testing shows which antibiotics will inhibit that specific organism’s growth. This combination guides targeted therapy, improving cure rates and reducing unnecessary broad-spectrum antibiotic use and resistance. It’s not used to measure urine sugar levels, assess kidney function, or image the urinary tract. In practice, clinicians may start empiric treatment based on symptoms and guidelines, but C&S is particularly helpful for complicated cases, recurrent infections, pregnancy, catheter-associated infections, or treatment failure to tailor the antibiotic choice.