Overview
Chorioamnionitis is an intra-amniotic infection involving the chorion and amniotic fluid, often complicating pregnancies and potentially leading to neonatal morbidity and mortality 15.Diagnosis
Key Diagnostic Criteria: Elevated total nucleated cell count (TNCC) in amniotic fluid 1.
Recommended Tests: Manual and automated TNCC analysis; clinical signs include maternal fever, uterine tenderness, and foul-smelling amniotic fluid 1.
Grading: Often diagnosed using clinical criteria such as maternal fever plus additional signs (e.g., uterine tenderness, fetal tachycardia) 3.Management
First-Line Treatment: Broad-spectrum antibiotics, with variability in regimens reported (e.g., single agent use by 30.0% of respondents) 3.
Postpartum Antibiotic Duration: Varies widely, ranging from no postpartum treatment to 48 hours post-delivery, depending on delivery type 3.
Specific Drug Classes: No specific doses mentioned; common regimens include ampicillin, cefazolin, or combinations 3.Special Populations
Pregnancy: Management practices vary significantly among obstetricians, with no consensus on optimal antibiotic duration or regimen 3.
Neonatal Impact: Severe cases can lead to neonatal death and significant morbidity 5.Key Recommendations
Utilize elevated TNCC in amniotic fluid as a key diagnostic marker for chorioamnionitis (Evidence: Moderate 1).
Employ a combination of clinical signs, including maternal fever and additional criteria, for diagnosing chorioamnionitis (Evidence: Moderate 3).
Consider obtaining multiple sections of extraplacental membranes for more accurate diagnosis, though incremental benefit diminishes beyond two sections (Evidence: Moderate 4).
Postpartum antibiotic treatment duration should be individualized based on delivery type and clinical judgment, acknowledging wide practice variation (Evidence: Weak 3).References
1 Krogh AKH, Nguyen DN, Bochsen L, Nielsen LN. Comparison of automated total nucleated cell counts vs manual cell counts in the amniotic fluid for the classification of disease status in healthy and diseased pigs. Veterinary clinical pathology 2022. link
2 Macones GA, Cahill A, Anthony O. Discussion: 'Risk of repeat clinical chorioamnionitis,' by Cohen-Cline et al. American journal of obstetrics and gynecology 2012. link
3 Greenberg MB, Anderson BL, Schulkin J, Norton ME, Aziz N. A first look at chorioamnionitis management practice variation among US obstetricians. Infectious diseases in obstetrics and gynecology 2012. link
4 Winters R, Waters BL. What is adequate sampling of extraplacental membranes?: a randomized, prospective analysis. Archives of pathology & laboratory medicine 2008. link
5 Bard JL, O'Leary JA. Chorioamnionitis and appendiceal abscess. A case report. The Journal of reproductive medicine 1994. link