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Published on: June 24, 2020
Prenatal Chlamydia trachomatis infection increases the risk of preeclampsia
Catherine L Haggerty1, Mark A Klebanoff, Inge Panum
1Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA ; Magee-Womens Research Institute, Pittsburgh, PA.
Insights
Prenatal Chlamydia trachomatis (CT) infection is uncommon but significantly increases preeclampsia risk. Early detection and treatment may improve pregnancy outcomes for women with CT.
Area of Science:
- Obstetrics and Gynecology
- Infectious Diseases
- Perinatal Medicine
Background:
- Preeclampsia is a leading cause of maternal and fetal morbidity worldwide.
- The role of infections, particularly Chlamydia trachomatis (CT), in preeclampsia etiology remains under investigation.
Purpose of the Study:
- To investigate the longitudinal association between prenatal Chlamydia trachomatis infection and the development of preeclampsia.
Main Methods:
- A nested case-control study within the Collaborative Perinatal Project.
- Analysis of serum samples from 205 preeclampsia cases and 423 normotensive controls.
- Serological testing for CT antibodies at first prenatal visit and delivery to identify incident infections.
Main Results:
- The prevalence of incident prenatal CT infection was low (1.4%).
- Women with prenatal CT infection had a significantly higher likelihood of developing preeclampsia (adjusted OR 7.2, 95% CI 1.3–39.7).
- The association remained significant after adjusting for key confounders.
Conclusions:
- Prenatal Chlamydia trachomatis infection is a potential risk factor for preeclampsia.
- Further research is warranted to explore the biological mechanisms linking CT and preeclampsia.
- Screening and treatment for CT during pregnancy may be beneficial for preeclampsia prevention.
Abstract:
The relationship between Chlamydia trachomatis (CT) and preeclampsia was examined longitudinally among 205 cases and 423 normotensive controls nested within the Collaborative Perinatal Project. Antibodies were analyzed at a first prenatal visit (mean 14.2 weeks) and at delivery. Prenatal infections were identified as IgG/IgM seroconversion or a four-fold rise in IgG antibody titers. Although serological evidence of incident prenatal CT infection was uncommon (n=9, 1.4%) in this general pregnant population, infected women were more likely to develop preeclampsia, after adjustment for maternal age, body mass index, smoking status, race and time between blood draws (ORadj 7.2, 95% CI 1.3 - 39.7).
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