Toward to establish selection criteria for rapid serological tests for COVID-19

Lucy Gabriela Delgado-Murcia; Johana Vargas; Marcela Mercado; Paola Gaviria Dentone; Carlos Arturo Álvarez-Moreno

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Toward to establish selection criteria for rapid serological tests for COVID-19

Delgado, Gabriela ^[1] ; Vargas, Johana ^[2] ; Mercado, Marcela ^[3] ; Gaviria, Paula ^[4] ; Álvarez, Carlos ^[1]
1. [1] Universidad Nacional de Colombia
  
  Universidad Nacional de Colombia
  
  Colombia
2. [2] Grupo de Investigación en Patología Anatómica y Clínica-INPAC. Fundación Universitaria Sanitas Dirección de Investigación en Salud Pública, Instituto Nacional de Salud-INS
3. [3] Dirección de Investigación en Salud Pública, Instituto Nacional de Salud-INS
4. [4] Unidad Avanzada de Inmunohematología, Instituto Distrital de Ciencia, Biotecnología e Innovación en Salud-IDBICS
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Localización: Infectio: Revista de la Asociación Colombiana de Infectología, ISSN-e 2422-3794, ISSN 0123-9392, Vol. 24, Nº. 3, 2020
Idioma: inglés
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Resumen
- COVID-19, the new pandemic is associated to SARS-CoV-2 virus infection. Social distancing and the testing have been the principal measures that have shown to be effective for the reduction of critical cases. Although the gold standard for diagnosis of COVID-19 is the RT-PCR, rapid serological tests could also be used for prevalence studies, and for epidemiological monitoring. In order to characterize the humoral immune response, we analyzed eight immuno-chromatographic test and one ELISA test, as a verification or secondary validation analysis used positive and negative control serum samples. Sera from negative and positive individuals [asymptomatic or symptomatic individuals, outpatient or inpatientor (intensive care unit)] were analyzed, and the following results were found: of all these rapid tests, only 4 exhibit clear banding patterns for IgG and two of these also showed results for IgM (only in a few symptomatic patients). Instead, with an ELISA test a preferential recognition was observed for symptomatic patients who were critically ill, whereas in asymptomatic individuals it did not show more than 25% of positivity. Understanding and validating molecular and serological tests are an essential component for the design of public health measures to response to the pandemic.