Management of Chorioamnionitis Before Delivery

Antibiotic Therapy

For penicillin-allergic patients without history of anaphylaxis, angioedema, respiratory distress, or urticaria, cefazolin is the preferred agent, as recommended by the Centers for Disease Control and Prevention 1
For penicillin-allergic patients with history of severe allergic reactions, alternative regimens such as clindamycin or vancomycin should be considered, according to the Centers for Disease Control and Prevention 1
For women receiving IAP, penicillin is preferred, with ampicillin or cefazolin as alternatives, as recommended by the Centers for Disease Control and Prevention 1

Chorioamnionitis is a significant risk factor for early-onset Group B Streptococcal (GBS) sepsis in infants, as reported by the American Academy of Pediatrics 2
If GBS status is unknown with intrapartum risk factors, IAP is indicated, according to the American Academy of Pediatrics 2

All well-appearing newborn infants born to women diagnosed with chorioamnionitis should undergo a "limited evaluation" including blood culture and complete blood count with differential and platelet count, as recommended by the American Academy of Pediatrics 2
The sensitivity of the CBC count is improved if delayed for 6-12 hours after birth, according to the American Academy of Pediatrics 2

Consultation with obstetric providers is important to determine the level of clinical suspicion for chorioamnionitis, as some signs are nonspecific, as recommended by the Centers for Disease Control and Prevention 1

For penicillin-allergic patients with a history of severe allergic reactions, alternative regimens should be considered, as recommended by the Centers for Disease Control and Prevention 3
Broader spectrum agents might be necessary for treatment of chorioamnionitis in certain clinical scenarios, as recommended by the Centers for Disease Control and Prevention 3
Neonates born to mothers with chorioamnionitis should undergo a limited evaluation and receive antibiotic therapy pending culture results, according to the Centers for Disease Control and Prevention and other guidelines 3

The Centers for Disease Control and Prevention recommends that newborns born to mothers with chorioamnionitis require limited evaluation and antibiotic therapy pending culture results, including ampicillin for GBS plus coverage for gram-negative pathogens including E. coli 4, 5, 6
For patients with severe penicillin allergy, the Centers for Disease Control and Prevention considers clindamycin or vancomycin as alternatives, with vancomycin specifically recommended for GBS prophylaxis in this population when susceptibility testing is unavailable 4, 5
The Centers for Disease Control and Prevention recommends that if suspected chorioamnionitis exists, broad-spectrum antibiotics active against GBS should replace routine GBS prophylaxis 7

For scheduled cesarean delivery in women with ruptured membranes or active labor, a first‑generation cephalosporin combined with azithromycin should be administered within 60 minutes before the skin incision. 8, 9

Prophylactic antibiotics must be given 30–60 minutes prior to the skin incision in scheduled cesarean sections, rather than after cord clamping. 8, 9
Administering antibiotics at this interval has been shown to reduce postoperative wound infection rates. 9

Vaginal preparation with povidone‑iodine solution should be performed to provide additional reduction in post‑cesarean infections. 8, 9
Abdominal skin preparation with chlorhexidine‑alcohol is preferred over aqueous povidone‑iodine solution for optimal antisepsis. 8, 9

All well‑appearing newborns of mothers diagnosed with chorioamnionitis should undergo a limited evaluation that includes a complete blood count with differential and platelet count, and a blood culture obtained before any antibiotics are started. 10
The diagnostic yield of the complete blood count improves when the sample is drawn 6–12 hours after birth rather than immediately. 10

Empiric intravenous antibiotics should be initiated pending culture results for infants undergoing the limited evaluation. 10
Empiric therapy should be discontinued promptly once the clinical course and laboratory findings exclude sepsis. 10
Infants should receive hospital observation for at least 48 hours; discharge may be considered after 24 hours if the infant meets discharge criteria, provided a follow‑up visit is arranged within 48–72 hours. 10