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Muestra de saliva para diagnóstico de SARS-CoV-2 por RT-qPCR en población ambulatoria

Authors: Noe Rigoberto Rivera; Carlos Alexander Ortega Pérez; Xochitl Sandoval López; Carlos Enrique Hernandez Avila;

Muestra de saliva para diagnóstico de SARS-CoV-2 por RT-qPCR en población ambulatoria

Abstract

Introducción. En El Salvador a la fecha, la técnica utilizada por el sistema nacional de salud para la obtención de la muestra para realizar PCR para SARS-CoV-2 es hisopado nasofaríngeo, diferentes investigadores han descrito la muestra de saliva como una muestra biológica útil para la detección de SARS-Cov-2, por esta razón se observa la oportunidad de aplicarla como una alternativa disponible para el diagnóstico de esta enfermedad. Objetivo. Evaluar la autotoma de muestra de saliva y secreción nasofaríngea por pacientes no hospitalizados como una alternativa de menor riesgo biológico y de menor costo que los hisopados nasofaríngeos convencionales. Metodología. Se procesaron las muestras de una mezcla de saliva y secreción faríngea obtenida por carraspeo autotomada por el paciente; la amplificación se realizó por RT-qPCR de los genes E y RdRp. Las muestras positivas se reevaluaron desde su extracción para confirmar la estabilidad de material genético de SARS-CoV-2 en la saliva y secreción nasofaríngea. Resultados. El promedio de resultados positivos por cada 100 pruebas fue de 7,05 por cada 100 pruebas COVID-19 realizadas con hisopado, este resultado es similar al 8 % de positividad durante el mismo período de estudio utilizando como muestra saliva y secreción faríngea autotomada por el paciente. Las ocho muestras positivas mantuvieron su reactividad para los genes E y RdRp al primer, tercer y quinto mes posdiagnóstico inicial para los dos protocolos utilizados. De igual forma, los eluidos de ARN positivos iniciales se mantuvieron positivos al primer, tercer y quinto mes. Conclusión. La muestra de saliva y secreción faríngea y su utilización para el diagnóstico de infección por SARS-CoV-2 podría ser una alternativa de bajo costo, no invasiva, al menos de igual utilidad que el hisopado nasofaríngeo para el estudio de población sintomática ambulatoria o con exposición a nivel comunitario.

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Applied Mathematics

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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