will be obtained at each visit. If they were assigned to the nitrofurantoin treatment regimen, they will also be asked to collect a urine sample at home on the third day. If the subject develops recurrent urinary symptoms or does not have resolution of symptoms after completing the initial treatment course, they will be asked to return to the clinic and provide another urine sample for analysis. They will then be treated with another standard antibiotic at no cost to them and will be withdrawn from the study at that time.