A 38-year-old woman, G5P4, at 10 weeks with a urine culture grew >100,000 CFU/mL of Escherichia coli. She is otherwise totally asymptomatic with no complaints. Which of the following is the best next step in management of this patient?

All pregnant patients are screened and treated for asymptomatic bacteriuria at the initial prenatal visit due to the risk of pyelonephritis, preterm bih and low bih weight associated with untreated asymptomatic bacteriuria. The most common pathogen is Escherichia coli. First-line antibiotics include cephalexin, amoxicillin-clavulanate, and nitrofurantoin