2.8 Excluded sequences – Contaminants, endogenous viruses and
bacteriophages
Circoviridae and Genomoviridae contigs and a complete
pneumovirus genome detected in our sequencing libraries were considered
likely reagent-associated contaminants (Porter et al., 2021) and not
analysed in this study. Additionally, any retrovirus and bacteriophage
sequences detected in this study were not analysed. The picobirnaviruses
detected here were also disregarded, since although commonly detected in
mammalian faeces they contain a bacterial motif that is only detected in
the viral genome of bacterial RNA viruses, consistent with their recent
classification as bacteriophages (Krishnamurthy et al., 2018).