A nurse is teaching a client about the manifestations of urinary tract infection. Which of the following tests is needed to determine which microorganism is causing the infection?

A. Incorrect – Blood creatinine: Measures kidney function but does not diagnose UTIs or identify the causative organism. B. Incorrect – Blood culture: Used to detect bacteria in the bloodstream (e.g., sepsis) but does not identify a UTI-causing pathogen. C. Correct – Urine culture and sensitivity: This test identifies the specific bacteria causing the UTI and determines which antibiotics will be most effective for treatment. D. Incorrect – Complete Blood Count (CBC): Can show elevated WBCs, indicating infection, but does not determine the pathogen.