Retrospective Study for the Clinical Evaluation of a Real-Time PCR Assay with Lyophilized and Ready-to-Use Reagents for Streptococcus agalactiae Detection in Prenatal Screening Specimens

Peris, María Paz (Universidad de Zaragoza) ; Martín-Saco, Gloria ; Alonso-Ezcurra, Henar ; Escolar-Miñana, Cristina (Universidad de Zaragoza) ; Rezusta, Antonio (Universidad de Zaragoza) ; Acero, Raquel (Universidad de Zaragoza) ; Milagro-Beamonte, Ana

Resumen: Streptococcus agalactiae is a leading cause of sepsis and meningitis in newborns and young infants. Screening programs and intrapartum antibiotic prophylaxis have reduced early neonatal onset of disease. The aim of this study was to evaluate a molecular assay with lyophilized and ready-to-use reagents: VIASURE® Streptococcus B Real Time PCR detection kit (CerTest Biotec) (Viasure qPCR assay) compared to both the GBS culture and a molecular assay with separated and frozen reagents: Strep B Real-TM Quant (Sacace Biotecnologies®) (Sacace qPCR assay). A total of 413 vaginal–rectal swabs from women between the 35th and 37th weeks of pregnancy were processed. GBS culture was firstly achieved through Granada medium and Columbia CNA agar at 35 °C in aerobic conditions. Then, nucleic acid extraction was performed for subsequent molecular analysis using both commercial assays. Discordant results were resolved via bidirectional Sanger sequencing. Viasure qPCR assay clinical sensitivity was 0.97 (0.92–0.99) and specificity 1 (0.98–1). This retrospective study demonstrated the good clinical parameters and the strong overall agreement (99.3%) between the Viasure qPCR assay and both reference assays. Finally, the added value observed of the assay under study was the stabilized and ready-to-use format, reducing the number of time-consuming steps, permitting the storage at room temperature, facilitating transport, being environmentally respectful, and reducing additional costs.

Idioma: Inglés

DOI: 10.3390/diagnostics12092189

Año: 2022

Publicado en: Diagnostics 12, 9 (2022), 2189 [9 pp.]
ISSN: 2075-4418

Factor impacto JCR: 3.6 (2022)

Categ. JCR: MEDICINE, GENERAL & INTERNAL rank: 64 / 169 = 0.379 (2022) - Q2 - T2

Factor impacto CITESCORE: 3.6 - Biochemistry, Genetics and Molecular Biology (Q3)

Factor impacto SCIMAGO: 0.67 - Clinical Biochemistry (Q2)

Tipo y forma: Article (Published version)

Área (Departamento): Área Nutrición Bromatología (Dpto. Produc.Animal Cienc.Ali.)
Área (Departamento): Área Sanidad Animal (Dpto. Patología Animal)
Área (Departamento): Área Microbiología (Dpto. Microb.Ped.Radio.Sal.Pú.)
Área (Departamento): Área Ing. Procesos Fabricación (Dpto. Ingeniería Diseño Fabri.)