Related Experiment Videos
Delayed appearance of Chlamydia trachomatis infections acquired at birth
1Department of Pediatrics, School of Medicine, University of Washington, Seattle.
Insights
Detecting Chlamydia trachomatis infections in newborns can be delayed. Initial positive cultures often appear after one month, particularly in rectal and vaginal sites, potentially due to maternal antibodies.
Area of Science:
- Neonatal infections
- Pediatric infectious diseases
- Microbiology
Background:
- Chlamydia trachomatis is a common cause of neonatal infections.
- Vertical transmission occurs during childbirth.
- Early detection is crucial for effective treatment and preventing complications.
Purpose of the Study:
- To determine the delay in detectability of Chlamydia trachomatis infections in infants acquired at birth.
- To identify the anatomical sites and timing of initial Chlamydia trachomatis detection.
Main Methods:
- Serial evaluation of 120 infants born to mothers with Chlamydia trachomatis infections.
- Collection of specimens from multiple anatomical sites for Chlamydia isolation.
- Analysis of culture results based on infant age and specimen site.
Main Results:
- 22% of infants tested in the first month were culture-positive in the conjunctiva; 25% in the pharynx.
- Initial positive rectal and vaginal cultures were observed later, around the third and fourth months of life.
- Latency of Chlamydia trachomatis detection in neonates can exceed one month, sometimes longer than 97 days.
Conclusions:
- Chlamydia trachomatis infections in neonates exhibit a significant delay in detectability.
- Maternal antibodies acquired in utero may suppress organism growth, contributing to this latency.
- Delayed detection highlights the need for extended monitoring and potentially adjusted diagnostic strategies for neonatal chlamydial infections.
Abstract:
To determine the delay in detectability of Chlamydia trachomatis infections acquired at birth, we serially evaluated 120 infants born vaginally to infected women. Specimens for isolation of Chlamydia were taken from several anatomic sites. Results were analyzed for the age and site of the initial positive culture from each infant. Of 112 infants tested in the first month of life, 22% were culture-positive in the conjunctiva and 25% were positive in the pharynx. Initial positive rectal and vaginal cultures were obtained only in the third and fourth months of life, and all initial vaginal cultures were associated with positive rectal cultures. The latency of C. trachomatis in infants exposed at birth is often more than 1 month and can be longer than 97 days. This latency might be caused by suppression of the growth of the organism by antibodies acquired in utero.