Culture: A urine culture and colony count are required to diagnose a UTI. White blood cells are often present but Red blood cells may not be present under the microscope in UTI's. Without a positive urine culture your physician is making a presumptive diagnosis of a UTI and is prescribing an antibiotic empirically. He/she may or may not schedule a post treatment urine test.
Answered 7/19/2019
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