Tascini et al used laboratory findings to evaluate neonates with a pertussis-like syndrome. Pertussis in infants can be severe and targeted therapy can improve outcomes. The authors are from multiple institutions in Italy.
Patient selection: age from 1 to 9 months
Parameters:
(1) serum procalcitonin concentration in ng/mL (method and reference range not given)
(2) absolute lymphocyte count per microliter
Procalcitonin
Lymphocyte Count
Diagnosis
>= 0.75 ng/mL
NA
bacterial other than B. pertussis
< 0.75 ng/mL
>= 10,400
pertussis
< 0.75 ng/mL
< 10,400
viral
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