[en] Coronavirus disease 2019 (COVID-19) is an acute infectious disease caused by the novel
coronavirus (SARS-CoV-2) identified in 2019. The COVID-19 outbreak continues to have devastat-
ing consequences for human lives and the global economy. The B-LiFe mobile laboratory in Pied-
mont, Italy, was deployed for the surveillance of COVID-19 cases by large-scale testing of first re-
sponders. The objective was to assess the seroconversion among the regional civil protection (CP),
police, health care professionals, and volunteers. The secondary objective was to detect asympto-
matic individuals within this cohort in the light of age, sex, and residence. In this paper, we report
the results of serological testing performed by the B-LiFe mobile laboratory deployed from June 10
to July 23, 2020. The tests included whole blood finger-prick and serum sampling for detection of
SARS-CoV-2 spike receptor-binding domain (S-RBD) antibodies. The prevalence of SARS-CoV-2
antibodies was approximately 5% (294/6013). The results of the finger-prick tests and serum sample
analyses showed moderate agreement (kappa = 0.77). Furthermore, the detection rates of serum
antibodies to the SARS-CoV-2 nucleocapsid protein (NP) and S-RBD among the seroconverted in-
dividuals were positively correlated (kappa = 0.60), at least at the IgG level. Seroprevalence studies
based on serological testing for the S-RBD protein or SARS-CoV-2 NP antibodies are not sufficient
for diagnosis but might help in screening the population to be vaccinated and in determining the
duration of seroconversion.
Disciplines :
Immunology & infectious disease
Author, co-author :
Nyabi, Omar; Université Catholique de Louvain - UCL > Institut de Recherche Expérimentale et Clinique (IREC), > Center for Applied Molecular Technologies (CTMA)
Bentahir, Mostafa; Université Catholique de Louvain - UCL > Institut de Recherche Expérimentale et Clinique (IREC), > Center for Applied Molecular Technologies (CTMA)
Ambroise, Jérôme; Université Catholique de Louvain - UCL > Institut de Recherche Expérimentale et Clinique (IREC) > Center for Applied Molecular Technologies (CTMA)
Bearzatto, Bertrand; Université Catholique de Louvain - UCL > Institut de Recherche Expérimentale et Clinique (IREC) > Center for Applied Molecular Technologies (CTMA)
Chibani, Nawfal; Université Catholique de Louvain - UCL > Institut de Recherche Expérimentale et Clinique (IREC) > Center for Applied Molecular Technologies (CTMA)
Smits, Benjamin; Université Catholique de Louvain - UCL > Institut de Recherche Expérimentale et Clinique (IREC) > Center for Applied Molecular Technologies (CTMA)
Durant, Jean François; Université Catholique de Louvain - UCL > Institut de Recherche Expérimentale et Clinique (IREC) > Center for Applied Molecular Technologies (CTMA)
Vybornov, Aleksandr; Université Catholique de Louvain - UCL > Institut de Recherche Expérimentale et Clinique (IREC) > Center for Applied Molecular Technologies (CTMA)
Thellin, Olivier ; Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Histologie
Elmoualij, Benaïssa ; Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Histologie
Gala, Jean-Luc; Université Catholique de Louvain - UCL > Institut de Recherche Expérimentale et Clinique (IREC) > Center for Applied Molecular Technologies (CTMA)
Language :
English
Title :
Diagnostic Value of IgM and IgG Detection in COVID-19 Diagnosis by the Mobile Laboratory B-LiFE: A Massive Testing Strategy in the Piedmont Region
Publication date :
24 March 2021
Journal title :
International Journal of Environmental Research and Public Health
ISSN :
1660-4601
eISSN :
1661-7827
Publisher :
Multidisciplinary Digital Publishing Institute (MDPI), Basel, Switzerland
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
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