Certified Clinical Medical Assistant Exam Practice Question

Correct Answer: D

Rationale: For diagnosing a urinary tract infection (UTI), a clean-catch midstream urine specimen is ideal as it minimizes contamination from the external genitalia, providing a more accurate representation of the urine in the bladder.

Option A, a second-voided specimen, may still contain contaminants from the urethra. Option B, a 2-hour postprandial specimen, is primarily used for glucose testing and may not reflect UTI presence accurately. Option C, a 24-hour collection, is more suited for assessing kidney function or specific substances over a day, rather than diagnosing infections.