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Updated: Sep 11, 2025

A Murine Model of Fetal Exposure to Maternal Inflammation to Study the Effects of Acute Chorioamnionitis on Newborn Intestinal Development
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A Murine Model of Fetal Exposure to Maternal Inflammation to Study the Effects of Acute Chorioamnionitis on Newborn Intestinal Development

Published on: June 24, 2020

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Prenatal Chlamydia Exposure and Early Neonatal Respiratory Failure in Very Preterm Infants

Jiamin Zhang1, Huanhuan Wang1, Jianguo Zhou1

  • 1Department of Neonatology, National Health Commission (NHC) Key Laboratory of Neonatal Diseases, Children's Hospital of Fudan University, National Children's Medical Center (Shanghai), Shanghai, People's Republic of China.

American Journal of Perinatology
|August 12, 2025
PubMed

Insights

Prenatal Chlamydia exposure significantly increases the risk of neonatal respiratory failure (NRF) in very preterm infants (VPIs). This finding highlights the need for interventions to protect high-risk VPIs from Chlamydia-related complications.

Area of Science:

  • Neonatology
  • Infectious Diseases
  • Public Health

Background:

  • Neonatal respiratory failure (NRF) is a leading cause of early mortality in very preterm infants (VPIs).
  • Limited evidence exists on the association between prenatal Chlamydia exposure and NRF in VPIs.

Purpose of the Study:

  • To investigate the association between prenatal Chlamydia exposure and the risk of NRF in VPIs.
  • To compare NRF rates in Chlamydia-exposed VPIs versus unexposed VPIs.

Main Methods:

  • Population-based cohort study using US National Vital Statistics System data (2021-2022).
  • Included VPIs (24-31 weeks gestation).
  • Propensity score matching (1:2 ratio) compared Chlamydia-exposed (n=2,757) with unexposed infants (n=5,507); NRF defined as >6 hours assisted ventilation.

Main Results:

  • Chlamydia-exposed VPIs had a significantly higher risk of NRF (30.5% vs. 25.4%; RR=1.20).
  • Higher risk of immediate postnatal assisted ventilation in the exposed group (47.2% vs. 41.5%; RR=1.15).
  • Consistent findings across subgroup and sensitivity analyses.

Conclusions:

  • Prenatal Chlamydia exposure is significantly associated with an increased risk of NRF in VPIs.
  • Further research is needed to develop preventive strategies for NRF in high-risk infants.
  • Early identification and management of Chlamydia in pregnancy may reduce NRF in VPIs.

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