Development of an instrument-free and low-cost ELISA dot-blot test to detect antibodies against SARS-CoV-2

Abstract: Most laboratory tests to detect the presence of anti-SARS-CoV-2 antibodies use enzyme-linked immunosorbent assays (ELISA) or chemiluminescence immunoassays (CLIA); however, equipment for these immunoassays is unavailable in many areas of low- and middle-income countries. Rapid lateral flow immunoassay (LFIA) tests are an equipment-free option, but their high price may make them less suitable for conducting seroprevalence surveys. Here, we describe a simple dual antigen ELISA dot-blot test to detect anti-SARS-CoV-2 IgG antibodies with high sensitivity (94–98%) and specificity (92–100%), compared to commercially available ELISA and CLIA options. Additionally, this ELISA dot-blot test can be completed in one hour using minimal laboratory equipment. Importantly, this immunoassay is significantly more affordable than most LFIA tests available on the global market. The dot-blot strips may be stored for up to 7 days under freezing conditions. This ELISA dot-blot test is a cost-effective option for conducting seroprevalence screenings in areas lacking ELISA or CLIA facilities, compared to LFIA tests.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
Development of an instrument-free and low-cost ELISA dot-blot test to detect antibodies against SARS-CoV-2 ; volume:18 ; number:1 ; year:2023 ; extent:11
Open life sciences ; 18, Heft 1 (2023) (gesamt 11)

Creator
Apú, Navilla
Madrigal-Redondo, Germán
Vega, María Herrera
Corrales-Aguilar, Eugenia
Segura-Ulate, Ismael

DOI
10.1515/biol-2022-0577
URN
urn:nbn:de:101:1-2023080914295110958133
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
14.08.2025, 10:44 AM CEST

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Associated

  • Apú, Navilla
  • Madrigal-Redondo, Germán
  • Vega, María Herrera
  • Corrales-Aguilar, Eugenia
  • Segura-Ulate, Ismael

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