A client comes to the clinic with reports of dysuria and frequency. The nurse practitioner suspects that the client is experiencing a UTI. Which laboratory testing would be most important?

A. Urinalysis: This is the most important test for diagnosing a urinary tract infection (UTI). A urinalysis can reveal the presence of bacteria, white blood cells, and other indicators of infection. B. Chest X-ray: A chest X-ray is not relevant for diagnosing a UTI and is typically used to assess the lungs. C. Blood culture: Blood cultures are not routinely performed for a simple UTI unless the infection is suspected to be severe or has spread to the bloodstream. D. Complete blood count (CBC): While a CBC may show an elevated white blood cell count in the presence of infection, it is not the primary test to confirm a UTI.