ABSTRACT
Fast, accurate sequencing methods are needed to identify new variants and genetic mutations of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) genome. Single Molecular Real Time (SMRT) Pacific Biosciences (PacBio) provides long, highly accurate sequences by circular consensus reads. This study compares the performance of a target capture SMRT Pacbio protocol for whole genome sequencing (WGS) of SARS-CoV-2 to that of an amplicon Pacbio SMRT sequencing protocol. The median genome coverage was higher (p<0.05) with the target capture protocol (99.3% [IQR: 96.3-99.5]) than with the amplicon protocol (99.3% [IQR :69.9-99.3]). The clades of 65 samples determined with both protocols were 100% concordant. After adjusting for Ct values, S gene coverage was higher with the target capture protocol than with the amplicon protocol. After stratification on Ct values, higher S gene coverage with the target capture protocol was observed only for samples w ith Ct>17 (p<0.01). Pacbio SMRT sequencing protocols appears to be suitable for WGS, genotyping and detecting mutations of SARS-CoV-2.
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