Figure 6.

Phylogenetic analysis of the 265 bp at 3′-end of norovirus GII ORF1. Representative sequences identified in this study are indicated by black circles (●). All strain sequence names contain specific ID, genotype and P-type. Reference strains and the most closely related strains were downloaded from GenBank. The Maximum Likelihood phylogenetic trees were constructed using MEGA X software [46] and 1000 bootstrap replicates based on the Kimura 2-parameter model. The sequences were labelled according to month and year of detection, wastewater type, P-type and genotype, e.g., 618RGII.2[P2] = GII.2[P2] virus detected in raw sewage collected in June 2018.