title: Placental intravascular organisms: a case report.
abstract: Ascending amniotic fluid bacterial infection is a cause of perinatal morbidity and mortality. A diagnosis of amniotic cavity infection can be inferred by documenting maternal (acute chorioamnionitis) and/or fetal (chorionic plate vasculitis; umbilical vasculitis/funisitis) inflammatory response. A definitive diagnosis of intrauterine/neonatal sepsis as a cause of stillbirth requires positive blood cultures obtained at postmortem examination. However, if postmortem examination is not performed, acute chorioamnionitis with/without fetal inflammatory response cannot be classified as a cause of demise. We present a case of intrauterine demise associated with acute chorioamnionitis, villitis, and intervillositis of the placenta. Although postmortem examination was denied, a conclusive diagnosis of intrauterine sepsis could be rendered by demonstration of gram-positive cocci within fetal vessels of umbilical cord, chorionic plate, and stem villi. This report highlights the importance of identification of placental intravascular organisms as unequivocal evidence of fetal sepsis, especially in cases where cultures cannot be obtained.
authors.affiliation: Department of Pathology, Rhode Island Hospital, Providence, RI, USA.
authors.forename: A
authors.initials: A
authors.lastname: Matoso
authors.forename: S
authors.initials: S
authors.lastname: Shapiro
authors.forename: M E
authors.initials: ME
authors.lastname: De Paepe
authors.forename: F
authors.initials: F
authors.lastname: Gundogan
mesh_terms: D000328:Adult; D000653:Amniotic Fluid / Q000382:microbiology; D002821:Chorioamnionitis; D002823:Chorion / Q000382:microbiology; D002824:Chorionic Villi / Q000382:microbiology / Q000473:pathology; D004200:Diseases in Twins / Q000382:microbiology*; D005260:Female; D005313:Fetal Death / Q000382:microbiology*; D005315:Fetal Diseases / Q000382:microbiology*; D006801:Humans; D010920:Placenta / Q000382:microbiology; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious; D011262:Pregnancy Trimester, Second; D012189:Retrospective Studies; D018805:Sepsis / Q000175:diagnosis* / Q000382:microbiology; D050497:Stillbirth; D014470:Umbilical Cord / Q000098:blood supply / Q000382:microbiology