Table 1.

The Rochester criteria

Infant appears generally well Infant has been previously healthy born at term (≥37 weeks gestation) did not receive perinatal antibiotics therapy was not treated for unexplained hyperbilirubinemia has not received antimicrobial agents has not been previously hospitalized has no chronic illness was not hospitalized longer than mother No evidence of skin, bone, joint or ear infection Laboratory values peripheral blood WBC count 5-15×10 3/mm 3 absolute band cells count <1500/mm 3 ≤10 WBC per high power field on microscopic examination of span urine sediment ≤5 WBC per high power field on microscopic examination of a stool smear (only for infants with diarrhea)

WBC: White blood cell