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A 19-year-old woman attending the local university experiences increasing urinary frequency, along with urgency and dysuria for 3 days. Over the next 12 hours or so, these symptoms persist, and her urine is pinkish. She then becomes concerned and goes to the campus student health clinic for advice. You are the nurse at the campus health clinic. Vital signs are: T = 37.5ºC, P = 105, R = 18, and BP = 105/70 mm Hg. The only abnormal finding on physical examination is