Table 2.
Detection assays of specific antigens of SARS-CoV-2.
| Assay | Targeted antigen | Detection limit | References |
|---|---|---|---|
| ACE2-LFIA | Spike 1 antigen | 1.86 × 105 copies/mL | (Lee et al., 2021) |
| Fluorescent immunochromatographic assay | NP antigen | 5 pg/mL | (Wang et al., 2021) |
| Gold nanoparticle-based biosensor | Spike antigen | 48 ng/mL | (Karakuş et al., 2021) |
| Field-effect transistor-based biosensor | Spike protein | 2.42 copies/mL | (Seo et al., 2020) |
| ScFv-Fc biosensor | NP antigen | 2.5 × 104 pfu/reaction | (Kim et al., 2020) |
| Aptamer | NP antigen | 10 ng/mL | (Chen et al., 2020) |