No abstract

Puerperal bacteremia and neonatal sepsis due to Haemophilus parainfluenzae is described in a mother and her infant. Indirect fluorescent antibody studies for specific IgM antibody directed against the H. parainfluenzae were performed on maternal and infant sera. The rise in infant IgM antibody titers suggested that the infant acquired the infecting organism during labor or delivery. H. parainfluenzae has not previously been implicated as a pathogen in either puerperal or neonatal sepsis.