28
Mar
AMC off-label modification of the CDC RT-qPCR Extraction of SARS-CoV-2 RNA and RT-qPCR were performed using commercially available kits and CDC recommendations. Vero E6 cells revealed active virus in only 4 out of 14 (28.6%) patients. The ability to isolate viral plaque-forming units (PFU) correlated with viral RNA loads of 6.79 log genomic copies/ml and only occurred in samples collected from patients early after symptom onset and before Batyl alcohol development of antibody. Culture in Vero E6 cells lacking the STAT1-dependent interferon signaling pathway increased the numbers of viral PFU detected but did not affect the incidence of positive cultures.…