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SARS-CoV-2 infections among pregnant women, 2020, Finland-Cross-testing of neutralization assays.
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- Author(s): Virtanen J;Virtanen J;Virtanen J; Korhonen EM; Korhonen EM; Korhonen EM; Salonen S; Salonen S; Vapalahti O; Vapalahti O; Vapalahti O; Vapalahti O; Sironen T; Sironen T; Sironen T; Jääskeläinen AJ; Jääskeläinen AJ
- Source:
Journal of medical virology [J Med Virol] 2024 Feb; Vol. 96 (2), pp. e29415.- Publication Type:
Journal Article; Research Support, Non-U.S. Gov't- Language:
English - Source:
- Additional Information
- Source: Publisher: Wiley-Liss Country of Publication: United States NLM ID: 7705876 Publication Model: Print Cited Medium: Internet ISSN: 1096-9071 (Electronic) Linking ISSN: 01466615 NLM ISO Abbreviation: J Med Virol Subsets: MEDLINE
- Publication Information: Publication: New York Ny : Wiley-Liss
Original Publication: New York, Liss. - Subject Terms: COVID-19*/diagnosis ; COVID-19*/epidemiology; Pregnancy ; Humans ; Female ; SARS-CoV-2 ; Pregnant Women ; Retrospective Studies ; Seroepidemiologic Studies ; Finland/epidemiology ; COVID-19 Testing ; Clinical Laboratory Techniques/methods ; Sensitivity and Specificity ; Antibodies, Neutralizing ; Antibodies, Viral ; Immunoglobulin G
- Abstract: We studied the development of the severe acute respiratory syndrome-related coronavirus (SARS-CoV-2) pandemic in southern Finland in 2020 and evaluated the performance of two surrogate immunoassays for the detection of neutralizing antibodies (NAbs). The data set consisted of 12 000 retrospectively collected samples from pregnant women in their first trimester throughout 2020. All the samples were initially screened for immunoglobulin G (IgG) with SARS-CoV-2 spike antibody assay (EIM-S1, Euroimmun) followed by confirmation with nucleocapsid antibody assay (Architect SARS-CoV-2, Abbott). Samples that were reactive (positive or borderline) with both assays were subjected to testing with commercial surrogate immunoassays of NeutraLISA (EIM) and cPass TM (GenScript Biotech Corporation) by using pseudoneutralization assay (PNAbA) as a golden standard. No seropositive cases were detected between January and March. Between April and December, IgG (EIM-S1 and Abbott positive) and NAb (PNAbA positive) seroprevalences were between 0.4% and 1.4%. NeutraLISA showed 90% and cPass 55% concordant results with PNAbA among PNAbA negative samples and 49% and 92% among PNAbA positive samples giving NeutraLISA better specificity but lower sensitivity than cPass. To conclude, seroprevalence in pregnant women reflected that of the general population but the variability of the performance of serological protocols needs to be taken into account in inter-study comparison.
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Olbrich L, Castelletti N, Schälte Y, et al. Head-to-head evaluation of seven different seroassays including direct viral neutralisation in a representative cohort for SARS-CoV-2. J Gen Virol. 2021;102(10):001653. - Grant Information: TYH2021110 Helsinki University Hospital fundings; TYH2023102 Helsinki University Hospital fundings; Jane and Aatos Erkko foundation
- Contributed Indexing: Keywords: IgG; SARS-CoV-2; neutralizing antibodies; serology
- Accession Number: 0 (Antibodies, Neutralizing)
0 (Antibodies, Viral)
0 (Immunoglobulin G) - Publication Date: Date Created: 20240131 Date Completed: 20240201 Latest Revision: 20240710
- Publication Date: 20240711
- Accession Number: 10.1002/jmv.29415
- Accession Number: 38293724
- Source:
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