Article ; Online: Establishment and application of a rapid molecular diagnostic platform for the isothermal visual amplification of group B Streptococcus based on recombinase polymerase.
Frontiers in cellular and infection microbiology
2024 Volume 14, Page(s) 1281827
Abstract: With growing concerns about Group B streptococcal (GBS) infections and their adverse effects on perinatal pregnancies, including infection, premature delivery, neonatal septicemia, and meningitis, it is urgent to promote GBS screening at all pregnancy ... ...
Abstract | With growing concerns about Group B streptococcal (GBS) infections and their adverse effects on perinatal pregnancies, including infection, premature delivery, neonatal septicemia, and meningitis, it is urgent to promote GBS screening at all pregnancy stages. The purpose of this study is to establish a device-independent, fast, sensitive, and visual GBS detection method. Taking advantage of the characteristics of the recombinase polymerase isothermal amplification (RPA), the activity of the nfo nuclease cleavage base analog (tetrahydrofuran, THF) site, and the advantages of visual reading of the lateral flow chromatography strip (LFS), a GBS detection method was developed. This method focused on the conservative region of the Christie-Atkins-Munch-Petersen factor encoded by the cfb gene, a virulence gene specific to GBS. Two forward primers, two biotin-labeled reverse primers, and one fluorescein isothiocyanate (FITC)-labeled and C3spacer-blocked probe were designed. The study involved optimizing the primer pair and probe combination, determining the optimal reaction temperature and time, evaluating specificity, analyzing detection limits, and testing the method on 87 vaginal swabs from perinatal pregnant women. The results showed that the visual detection method of GBS-RPA-LFS, using the cfb-F1/R2/P1 primer probe, could detect GBS within 15 min at the temperature ranging from 39°C to 42°C. Furthermore, the method specifically amplified only GBS, without cross-reacting with pathogens like |
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MeSH term(s) | Infant, Newborn ; Female ; Pregnancy ; Humans ; Recombinases ; Nucleic Acid Amplification Techniques/methods ; Sensitivity and Specificity ; Pathology, Molecular ; Nucleotidyltransferases ; Streptococcus agalactiae/genetics ; Streptococcal Infections/diagnosis |
Chemical Substances | Recombinases ; Nucleotidyltransferases (EC 2.7.7.-) |
Language | English |
Publishing date | 2024-02-23 |
Publishing country | Switzerland |
Document type | Journal Article |
ZDB-ID | 2619676-1 |
ISSN | 2235-2988 ; 2235-2988 |
ISSN (online) | 2235-2988 |
ISSN | 2235-2988 |
DOI | 10.3389/fcimb.2024.1281827 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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