Campylobacter infection during pregnancy

By trimester

Weeks 1–13

1st trimester

Early pregnancy nausea can obscure a foodborne illness, but diarrhea, fever, bloody stool, or a clear exposure pattern is not typical morning sickness. Call promptly because dehydration can develop when vomiting and diarrhea occur together.

Weeks 14–27

2nd trimester

Campylobacter symptoms often begin two to five days after exposure. Tell the clinician about undercooked poultry, unpasteurized milk, untreated water, travel, and animal contact so testing and source control can be considered.

Weeks 28–birth

3rd trimester

Late pregnancy does not change the organism's usual incubation pattern, but fever, dehydration, contractions, reduced fetal movement, or inability to drink needs obstetric assessment rather than waiting for diarrhea to run its course.

What does the evidence show for campylobacter infection?

• CDC lists pregnant people among those at risk for severe Campylobacter illness. Typical features are diarrhea that may be bloody, abdominal pain, fever, nausea, and sometimes vomiting, usually beginning two to five days after exposure. 1
• CDC advises extra fluids while diarrhea lasts. Most infections settle without antibiotics, but clinicians may use them for severe illness or for people at higher risk and should consider resistance information when selecting an agent. 2
• Campylobacter is identified with a laboratory test. Rapid tests detect bacterial genetic material, while culture provides more detailed organism information that can guide antibiotic selection and public-health investigation. 3
• CDC advises medical contact for diarrhea or vomiting lasting more than two days, bloody stool or urine, fever above 102°F, dehydration, or new weakness and tingling. These thresholds are especially relevant in pregnancy because severe illness risk is higher. 4
• A 1992 review of six pregnancies with proven Campylobacter jejuni infection reported stillbirths in two pregnancies, early neonatal antibiotics in two, and no adverse outcome in two whose maternal infection received care. The tiny uncontrolled series cannot estimate fetal risk or prove benefit from antibiotics. 5

When should I call my provider about campylobacter infection?

Seek urgent care for Campylobacter symptoms with bloody stool or urine, fever of 100.4°F (38°C) or higher, little or no urination, very dark urine, severe thirst, dry mouth, dizziness, or inability to keep fluids down. New weakness or tingling can be an early sign of Guillain-Barré syndrome and needs urgent assessment. During pregnancy, contractions, vaginal bleeding, leaking fluid, or reduced fetal movement also warrant immediate obstetric guidance. If you are ever unsure which side of the line you are on, make the call. Obstetric teams handle these check-ins as routine, not as overreacting.