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Forward Genetic Approaches in Chlamydia trachomatis
Published on: October 23, 2013
Study on vertical transmission of Chlamydia trachomatis using PCR and DNA sequencing
1Department of Pediatrics, Clinical Molecular Biology Laboratory, Pediatric Research Institute, Chongqing Medical University, Chongqing 400014, China. jiangsm@public.cta.cq.cn
Chinese Medical Journal
|October 12, 2001
Summary
Chlamydia trachomatis is common in Chongqing, China. This study confirmed vertical transmission from mother to infant using DNA sequencing, showing a 55% transmission rate.
Area of Science:
- Reproductive Health
- Infectious Diseases
- Microbiology
Background:
- Chlamydia trachomatis (CT) is a common sexually transmitted infection.
- Vertical transmission of CT can lead to infant infections like conjunctivitis and pneumonia.
- Data on CT prevalence and vertical transmission in Chongqing, China, is limited.
Purpose of the Study:
- To determine the prevalence of Chlamydia trachomatis in pregnant women in Chongqing, China.
- To investigate the rate of vertical transmission of Chlamydia trachomatis from mothers to their infants.
- To confirm CT vertical transmission using molecular methods.
Main Methods:
- Collected specimens from 278 pregnant women and 79 infants.
- Utilized cell culture, polymerase chain reaction (PCR), and DNA sequence analysis for CT detection.
- Isolated CT using McCoy cell culture and analyzed DNA sequences.
Main Results:
- Chlamydia trachomatis prevalence was 10.8% by culture and 14.0% by PCR in pregnant women.
- The vertical transmission rate of CT was 55.0%.
- Infants born to CT-positive mothers had incidences of conjunctivitis (27.3%) and pneumonia (18.2%).
- Identical CT DNA sequences were found in mothers and their infected infants.
Conclusions:
- Chlamydia trachomatis infection is prevalent in the studied population in Chongqing.
- This study provides the first evidence of CT vertical transmission confirmed by DNA sequence analysis in the region.
- Vertical transmission poses a significant risk for infant infections.
