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Published on: October 23, 2011
Quantitative real-time PCR and magnetic separation strategy for specific detection of group B streptococcus in
Xu Tang1, Lin-Ping Fan2,3, Yang Liu2,3,4
1Department of Clinical Laboratory, Jiangxi Maternal and Child Health Hospital, Nanchang, 330008, Jiangxi, China.
Insights
Prenatal screening for Group B Streptococcus (GBS) is crucial for preventing adverse outcomes. This study introduces a sensitive magnetic separation combined with quantitative real-time PCR (MS-RT-qPCR) assay for rapid GBS detection.
Area of Science:
- Microbiology
- Clinical Diagnostics
- Molecular Biology
Background:
- Group B Streptococcus (GBS) is a significant cause of adverse outcomes in perinatal women, including urinary tract infections, intrauterine infections, premature birth, and stillbirth.
- Effective perinatal screening for GBS is essential for guiding clinical interventions and improving delivery outcomes.
Purpose of the Study:
- To establish a sensitive and rapid method for detecting Group B Streptococcus in perinatal women.
- To evaluate the efficacy of magnetic separation (MS) technology combined with quantitative real-time PCR (RT-qPCR) for GBS detection.
Main Methods:
- The study utilized magnetic separation (MS) technology for sample pre-treatment to enhance detection speed and sensitivity.
- Quantitative real-time PCR (RT-qPCR) was established targeting the cfb gene of GBS.
- Penicillin-functionalized magnetic beads were employed for efficient enrichment and capture of GBS.
Main Results:
- Penicillin-functionalized magnetic beads demonstrated effective enrichment and capture of GBS.
- The developed MS-RT-qPCR assay achieved high detection sensitivity, capable of detecting GBS at concentrations as low as 10^2 CFU/mL in urine samples.
Conclusions:
- The MS-RT-qPCR assay provides a viable and sensitive approach for prenatal screening of GBS in perinatal populations.
- This method can aid in timely clinical interventions, potentially improving delivery outcomes and reducing GBS-related complications.
Introduction:
Group B streptococcus(GBS)often causes adverse outcomes such as urinary system infection, intrauterine infection, premature birth, and stillbirth in perinatal women. Perinatal screening of GBS is conducive to guiding clinical scientific intervention and improving delivery outcomes.This study quantitative real-time PCR (RT-qPCR) combined with magnetic separation was used for GBS detection.
Materials And Methods:
Sample pre-treatment in this study involved the utilization of magnetic separation (MS) technology, aiming to expedite the detection process and enhance detection sensitivity, and the cfb gene of group B streptococcus was used as the target gene to establish quantitative real-time PCR (RT-qPCR) to detect group B streptococcus.
Results:
It was found that penicillin-functionalized magnetic beads had a good ability to enrich and capture group B Streptococcus.The findings revealed an exceptional detection sensitivity, with the ability to detect B streptococcus in urine samples at levels as low as 102 CFU/mL.
Conclusions:
The utilization of MS technology in conjunction with the RT-qPCR (MS-RT-qPCR) assay, as demonstrated in this study, offers a viable approach for prenatal screening of group B streptococcus among perinatal women.
