Medical Definition of Neonatal sepsisNeonatal sepsis: A bacterial infection of the blood in a neonate, an infant younger than 4 weeks of age. Babies with sepsis may be listless, overly sleepy, floppy, weak, and very pale. Neonatal sepsis is life-threatening. Last Editorial Review: 3/19/2012 Back to MedTerms online medical dictionary A-Z List Need help identifying pills and medications? |


