Which test helps determine the antibiotic to treat a urinary infection?

Which test helps determine the antibiotic to treat a urinary infection?

• A. Renal ultrasound.
• B. Urine culture and sensitivity.
• C. Abdominal X-ray.
• D. Urinalysis without culture.

Answer: (B)

To tailor antibiotic therapy for a urinary infection, you need to know exactly which organism is causing it and which antibiotics will work against it. Urine culture with sensitivity testing does this by growing the bacteria from the urine and testing its response to different antibiotics. The result shows which drugs are effective (and which aren’t), so you can choose the most appropriate antibiotic for that specific infection and reduce the risk of promoting resistance. Other tests don’t directly determine antibiotic choice. A renal ultrasound or abdominal X-ray looks at anatomy, stones, or obstruction and isn’t used to pick antibiotics. A urinalysis without culture can indicate an infection’s presence but doesn’t reveal which antibiotic will be effective.

To tailor antibiotic therapy for a urinary infection, you need to know exactly which organism is causing it and which antibiotics will work against it. Urine culture with sensitivity testing does this by growing the bacteria from the urine and testing its response to different antibiotics. The result shows which drugs are effective (and which aren’t), so you can choose the most appropriate antibiotic for that specific infection and reduce the risk of promoting resistance.

Other tests don’t directly determine antibiotic choice. A renal ultrasound or abdominal X-ray looks at anatomy, stones, or obstruction and isn’t used to pick antibiotics. A urinalysis without culture can indicate an infection’s presence but doesn’t reveal which antibiotic will be effective.