A 9-year-old girl presents with dysuria and urinary frequenc…
A 9-year-old girl presents with dysuria and urinary frequency. She is afebrile and has no flank pain or vomiting. UA shows positive leukocyte esterase and nitrites. She is started on TMP-SMX (Bactrim). Two days later, urine culture grows E. coli>100,000 CFU/mL resistant to TMP-SMX and susceptible to cephalexin and nitrofurantoin. She is still mildly symptomatic.
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