Synopsis

 villitis
 intervillositis
 amnionitis

• acute chorioamnionitis

Etiology

 bacterial placental infections

• Staphylococcus
• Streptococcus
• Pneumococcus
• Enteric bacteria
• Listeria
• Campylobacter fetus
• Salmonella
• Brucella
• Mycobacteria
• Francisella tularensis
• Treponema pallidum
• Vibrio cholerae
• Chlamydia
• Mycoplasma
• Rickettsia
• Leptospira

 viral placental infections

• Cytomegalovirus (CMV)
• Rubella
• Hepatitis virus (HBV, HCV)
• Herpes simplex
• Varicella zoster
• Variola alastrim
• Vaccinia
• Mumps
• Measles
• Coxsackie
• poliovirus
• Parvovirus B19
• Epstein-Barr virus (EBV)
• ECHOvirus
• HIV
• Western equine encephalitis

 parasitic placental infections

• coccidioidomycosis
• Toxoplasma
• Plasmodium malariae
• Trypanosoma
• Schistosoma

References

 Satosar A, Ramirez NC, Bartholomew D, Davis J, Nuovo GJ. Histologic correlates of viral and bacterial infection of the placenta associated with severe morbidity and mortality in the newborn. Hum Pathol. 2004 May;35(5):536-45. PMID: #15138926#