Abstract: An in vitro method and a kit for detecting the SARS-CoV-2 virion using a colorimetric immunosensor in an oral biological sample selected from saliva and sputum are provided. The method and kit are based on the use of gold capture nanoparticles carrying on their surface at least one antibody capable of binding a SARS-CoV-2 surface antigen.

Abstract: An in vitro method and a kit for detecting the SARS-CoV-2 virion using a colorimetric immunosensor in a biological sample from the upper respiratory tract of a subject is provided. The biological sample is a nasopharyngeal swab sample. The in vitro method and kit are based on the use of gold capture nanoparticles carrying on their surface at least one antibody capable of binding a SARS-CoV-2 surface antigen.

Abstract: Biomarker detection sensors for detecting disease-specific biomarkers, kits based thereon, methods for determining disease-specific biomarkers in body fluids and uses are presented. The sensors include a substrate having bound thereon metal nanoparticles arranged in branched two-dimensional structures and/or a two-dimensional lattice, and anti-biomarker receptors bound to the metal nanoparticles.