[Acute neonatal parotitis due to Streptococcus agalactiae].

We report two cases of group B streptococcal acute neonatal parotitis. Both patients showed late-onset infections in association with acute parotid swelling, without cellulitis or purulent drainage from Stensen's duct. Neither of the infants had meningitis, and Streptococcus agalactiae was isolated from blood cultures. Differential diagnosis with cellulitis-adenitis syndrome was based on clinical manifestations with supporting radiographic findings, which revealed parotid swelling with increased vascularization. Both infants were treated with a 2-week-course of intravenous cefotaxime, with complete recovery. Although the most common cause of acute neonatal bacterial parotitis is Staphylococcus aureus, Streptococcus agalactiae should be included in the differential diagnosis, especially in infants with late-onset sepsis.