PCR was developed in 1983 ... The cycle in which a significant increase in fluorescence above the threshold is measured—referred to as the C T value—can therefore be used to calculate the ...
The mean real-time PCR threshold cycle (Ct) values of all 46 positives were 21 while the mean Ct value of the samples with discordant or invalid results was 20.3 and 25, respectively. The PPA of ...
Reflex testing of the specimen with the Xpert Xpress CoV-2/Flu/RSV plus assay (Cepheid) revealed an influenza A cycle threshold (Ct ... chain-reaction (RT-PCR) test specific for influenza A ...