A 2-year-old girl presents with high fever (39.5°C), vomiting, and irritability. Urinalysis shows leukocyte esterase and nitrites positive. Urine culture grows >100000 CFU/mL Escherichia coli. Renal ultrasound is normal. What is the most appropriate next step in evaluation?
A
Immediate VCUG for all children after first UTI
B
No imaging required after febrile UTI
C
Perform VCUG only if recurrent infection or abnormal ultrasound