Management of Fever at 18 Weeks Gestation

Immediate Assessment and Diagnostic Workup

The American College of Obstetricians and Gynecologists recommends obtaining a detailed exposure history, including livestock contact and occupational exposures, to guide empiric treatment decisions for pregnant women with fever at 18 weeks gestation 1
Q fever infection at 18 weeks gestation poses a high risk for premature delivery, rather than miscarriage, which is more common in first trimester infections, according to the Centers for Disease Control and Prevention 2, 1

A complete blood count is essential in differentiating Q fever from bacterial processes, as most acute infections show normal white blood cell counts, as recommended by the American College of Obstetricians and Gynecologists 1
Liver function tests should be performed, as elevated transaminases occur in up to 85% of Q fever cases, according to the Centers for Disease Control and Prevention 1
Q fever serologic testing, including Phase I and Phase II IgG and IgM antibodies, should be performed if any livestock exposure or unexplained fever exists, as recommended by the American College of Obstetricians and Gynecologists 1

The American College of Obstetricians and Gynecologists recommends acetaminophen as the only safe first-line antipyretic during pregnancy, which should be administered immediately for fever control 1, 4
Trimethoprim-sulfamethoxazole 160mg/800mg twice daily should be initiated throughout the remainder of pregnancy if Q fever cannot be excluded, as this reduces adverse fetal outcomes from 81% to 40% and prevents progression to chronic Q fever, according to the American College of Obstetricians and Gynecologists 1
Mandatory folic acid supplementation, at least 400 μg daily, must accompany trimethoprim-sulfamethoxazole to reduce neural tube defect risk, as recommended by the American College of Obstetricians and Gynecologists 5

Pregnant women with Q fever should be monitored closely, as they remain at risk for recrudescent infection in subsequent pregnancies, requiring close monitoring, according to the Centers for Disease Control and Prevention 2
Serologic monitoring should be performed at 3, 6, 12, 18, and 24 months postpartum to detect progression to chronic disease, as recommended by the American College of Obstetricians and Gynecologists 1

Persistent high fever unresponsive to acetaminophen requires immediate medical attention, as recommended by the American College of Obstetricians and Gynecologists 4
Severe shortness of breath or difficulty breathing, symptoms lasting >10 days without improvement, and development of unilateral facial pain with purulent nasal discharge are warning signs that require escalation, according to the American College of Obstetricians and Gynecologists 4