To the Editor.—

Crain and Gershel recently presented a well-performed prospective study of 442 infants younger than 8 weeks of age with temperature ≥100.6°F. Among these infants, 33 patients (7.5%) had urinary tract infection (UTI) defined by a positive urine culture. Of those, 16 were at high risk for infection, based on the presence of a white blood cell count > 15 000, erythrocyte sedimentation rate > 30, and subjective impression of sepsis; 13 were at low risk for infection; in four the risk status was unknown.

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