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Arch Pediatr Adolesc Med. 2000;154:315-316.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

The recent article by Baker and Bell¹ does not provide data that support the conclusion that febrile infants younger than 1 month are different from febrile infants aged 1 to 2 months. Their current study retrospectively applied some of the criteria previously analyzed prospectively in infants aged 1 to 2 months.² In the original study, infants were judged to be "screening-positive" if the infant had evidence of a bacterial infection on examination, an infant observation score higher than 10, or a laboratory value outside the defined reference range. Their definition of reference laboratory values included the following: white blood cell count of peripheral blood, fewer than 15,000 cells per cubic millimeter; findings from urinalysis, fewer than 10 white blood cells per high-power field and few or no bacteria detected by bright-field microscopy (with spun specimens used for both tests); cerebrospinal fluid values, fewer than 8 white blood cells per cubic . . . [Full Text of this Article]