Investigation and Management of Fever in Pregnancy

Initial Assessment and Exposure History

The American College of Obstetricians and Gynecologists recommends obtaining a detailed exposure history immediately to guide empiric treatment decisions, specifically asking about livestock contact, occupational animal exposures, sick contacts, and travel history 1, 2, 3, 4
Livestock contact is critical for Q fever risk assessment, and the Centers for Disease Control and Prevention recommends inquiring about cattle, sheep, and goats exposure 1
The World Health Organization suggests that occupational animal exposures, such as working with animals, should be considered when assessing Q fever risk 3, 4

The American College of Obstetricians and Gynecologists recommends ordering a complete blood count, liver function tests, and Q fever serologic testing if any livestock exposure or unexplained fever exists 1, 2
Liver function tests show elevated transaminases in up to 85% of Q fever cases, according to the Centers for Disease Control and Prevention 1, 2

The American College of Radiology recommends obtaining chest radiography if respiratory symptoms are present, as radiographic abnormalities appear in >96% of Q fever pneumonia cases 1, 3, 5

The American College of Obstetricians and Gynecologists recommends administering acetaminophen immediately as the only safe first-line antipyretic during pregnancy, which may provide protective effects against fever-related fetal harm 1, 2
The Centers for Disease Control and Prevention suggests that trimethoprim-sulfamethoxazole should be initiated immediately if Q fever cannot be excluded, and continued throughout the remainder of pregnancy 1, 2
Mandatory folic acid supplementation must accompany trimethoprim-sulfamethoxazole treatment to reduce neural tube defect risk, according to the World Health Organization 2

The American College of Obstetricians and Gynecologists states that first trimester infection is associated with the highest risk for miscarriage, progression to chronic maternal Q fever, and untreated infection most likely to result in miscarriage 1, 2, 4
The Centers for Disease Control and Prevention recommends that second/third trimester infection is more likely to cause premature delivery rather than miscarriage, and significant risk for intrauterine growth retardation 1, 2

The American College of Obstetricians and Gynecologists recommends continuing trimethoprim-sulfamethoxazole with folic acid supplementation throughout pregnancy if Q fever diagnosed, and monitoring for treatment response and complications 1, 2
The Centers for Disease Control and Prevention suggests performing serologic monitoring at 3, 6, 12, 18, and 24 months postpartum to detect progression to chronic disease 1, 2

The American College of Obstetricians and Gynecologists recommends reassessing or escalating care if persistent high fever unresponsive to acetaminophen, severe shortness of breath or difficulty breathing, or symptoms lasting >10 days without improvement 1, 2

The Centers for Disease Control and Prevention warns against delaying treatment waiting for serologic confirmation, and recommends starting trimethoprim-sulfamethoxazole empirically if Q fever cannot be excluded based on exposure history 1, 2
The American College of Obstetricians and Gynecologists advises against using doxycycline in pregnancy due to fetal effects, despite being first-line for Q fever in non-pregnant adults 1, 6

The Centers for Disease Control and Prevention recommends that all pregnant women should receive inactivated influenza vaccine during any trimester, including the first trimester, as soon as seasonal vaccine becomes available, as vaccination is safe throughout pregnancy with extensive safety data showing no increased risk of congenital malformations 7, 8
The Centers for Disease Control and Prevention advises that women with Q fever during pregnancy remain at risk for recrudescent infection in subsequent pregnancies and require close monitoring, with serologic monitoring at 3, 6, 12, 18, and 24 months postpartum to detect progression to chronic Q fever disease 9, 10, 11
The Centers for Disease Control and Prevention recommends that first trimester Q fever infection should be treated with trimethoprim-sulfamethoxazole 160mg/800mg twice daily immediately and continued throughout the remainder of pregnancy, accompanied by mandatory folic acid supplementation (at least 400 μg daily) to reduce neural tube defect risk, as this reduces adverse fetal outcomes from 81% to 40% and prevents progression to chronic Q fever 9, 10, 11