Among 439 infants presenting with symptoms of upper respiratory tract infection and temperature ≥39°C, 19 (4.3% [95% confidence interval, 2.8-6.7]) received a diagnosis of urinary tract infection (abnormal urine dipstick from a sterile urine sample and positive urine culture). Regardless of respiratory presentation, all infants presenting with a temperature of 39°C should be screened for urinary tract infection.