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. 2021 Jun 17;141:104900. doi: 10.1016/j.jcv.2021.104900

Table 1.

Analytical sensitivity of Quidel SARS Antigen FIA test using dilution of a pooled positive.

Sample Dilution Initial Replicates Detected Initial% Positive Confirmatory Replicates Detected Copies/mL (ddPCR) Copies/swab (ddPCR) Copies/mL (Cobas 6800) Copies/swab (Cobas 6800)
Neat 3/3 100% 1.10E+07 5.50E+05 8.66E+06 1.73E+05
1:9 3/3 100% 20/20 1.22E+06 6.11E+04 9.62E+05 4.81E+04
1:10 3/3 100% 12/20 1.10E+06 5.50E+04 8.66E+05 4.33E+04
1:20 0/3 0% 5.50E+05 2.75E+04 4.33E+05 8.66E+03
1:30 0/3 0% 3.67E+05 1.83E+04 2.89E+05 5.77E+03
1:40 0/3 0% 2.75E+05 1.38E+04 2.16E+05 4.33E+03
1:50 0/3 0% 2.20E+05 1.10E+04 1.73E+05 3.46E+03
1:100 0/3 0% 1.10E+05 5.50E+03 8.66E+04 1.73E+03
1:1000 0/3 0% 1.10E+04 5.50E+02 8.66E+03 4.81E+01
1:10,000 0/3 0% 1.10E+03 5.50E+01 8.66E+02 4.33E+01
1:100,000 0/3 0% 1.10E+02 5.50E+00 8.66E+01 8.66E+00
Pos Control 6/6 100%
Neg Control 0/6 0%