1. SARS-CoV-2 immunochromatographic IgM/IgG rapid test in pregnancy: A false friend?
- Author
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Fabre, M, Ruiz-Martinez, S, Monserrat Cantera, ME, Cortizo Garrido, A, Beunza Fabra, Z, Peran, M, Benito, R, Mateo, P, Paules, C, and Oros, D
- Subjects
SARS-CoV-2 ,PREGNANT women ,COVID-19 pandemic ,CHEMILUMINESCENCE assay ,ENZYME-linked immunosorbent assay - Abstract
Background: An increasing body of evidence has revealed that SARS-CoV-2 infection in pregnant women could increase the risk of adverse maternal and fetal outcomes. Careful monitoring of pregnancies with COVID-19 and measures to prevent neonatal infection are warranted. Therefore, rapid antibody tests have been suggested as an efficient screening tool during pregnancy. Cases: We analysed the clinical performance during pregnancy of a rapid, lateral-flow immunochromatographic assay for qualitative detection of SARS-CoV-2 IgG/IgM antibodies. We performed a universal screening including 169 patients during their last trimester of pregnancy. We present a series of 14 patients with positive SARS-CoV-2 immunochromatographic assay rapid test result. Immunochromatographic assay results were always confirmed by chemiluminescent microparticle immunoassays for quantitative detection of SARS-CoV-2 IgG and IgM+IgA antibodies as the gold standard. We observed a positive predictive value of 50% and a false positive rate of 50% in pregnant women, involving a significantly lower diagnostic performance than reported in non-pregnant patients. Discussion: Our data suggest that although immunochromatographic assay rapid tests may be a fast and profitable screening tool for SARS-CoV-2 infection, they may have a high false positive rate and low positive predictive value in pregnant women. Therefore, immunochromatographic assay for qualitative detection of SARS-CoV-2 IgG/IgM antibodies must be verified by other test in pregnant patients. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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