concentrations to determine the duration of antimicrobial therapy in an infant
with an elevated value (≥1.0 mg/dL). Procalcitonin concentrations increase within 2 hours of an infectious episode, peak at 12 hours, and normalize within 2 to 3 days in healthy adult volunteers.A physiologic increase in procalcitonin concentration occurs within the first
24 hours of birth, and an increase in serum concentrations can occur with noninfectious conditions (eg, respiratory distress syndrome