OSCE stationVivaEarly-onset sepsis
A viva on how the circumstances of preterm birth shape early-onset sepsis risk and management.
Two babies are admitted to the neonatal unit on the same night.
- Baby A: 30+1 weeks, born by caesarean section for severe pre-eclampsia; no labour, no induction, membranes intact until delivery. On CPAP, stable.
- Baby B: 27+5 weeks, born vaginally after spontaneous preterm labour; membranes ruptured 48 hours before delivery. Ventilated.
Questions
How does the AAP categorise each baby's risk of early-onset sepsis, and on what basis?
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- By the circumstances of preterm birth.
- Baby A is lower risk: all three criteria are met (obstetric, non-infectious indication; caesarean delivery; no labour, induction attempt or rupture of membranes before delivery).
- Baby B is in the highest-risk group (preterm labour and PROM).
What initial approach does the AAP describe for each?
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- Baby A: either no laboratory evaluation and no empirical antibiotics, or a blood culture and clinical monitoring. If he does not improve after stabilisation or has severe instability, antibiotics may be reasonable but are not mandatory.
- Baby B: blood culture and empirical antibiotics (ampicillin and gentamicin); consider CSF culture before antibiotics if tolerated and it won't delay treatment.
Why can't the Neonatal Early-Onset Sepsis Risk Calculator be used?
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- The AAP states that it does not apply to infants born before 34 0/7 weeks.
- Gestational age is the strongest predictor, and about two-thirds of preterm births are associated with preterm labour, PROM or clinical chorioamnionitis, so term risk stratification can't be applied in the same way.
Baby B's blood culture is sterile at 40 hours, but he is still ventilated and needs inotropes. Should antibiotics continue?
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- When blood cultures are sterile, antibiotics should be discontinued by 36 to 48 hours unless there is clear evidence of site-specific infection.
- Persistent cardiorespiratory instability is common in VLBW infants and is not alone an indication for prolonged antibiotics.
Based on: American Academy of Pediatrics, Management of neonates born at ≤34 6/7 weeks' gestation with suspected or proven early-onset bacterial sepsis (Pediatrics, 2018).
Tiny Taught · Neonatal & Paediatric Education
Teaching material for exam preparation. Doses and thresholds are for orientation only; follow your local guidelines.