Volume 26, Number 8—August 2020
Research
CrAssphage as a Novel Tool to Detect Human Fecal Contamination on Environmental Surfaces and Hands
Figure 1

Figure 1. Phylogenetic relationships and pairwise sequence comparison of crAssphage strains from swab samples collected during norovirus outbreaks on cruise ships. A) Phylogeny of crAssphage on cruise ships, showing ship and source for each strain. Inset shows position of cruise ship strains among reference strains; scale bar indicates number of nucleotide changes between sequences. B) Color-coded pairwise identity matrix for crAssphage strains. Each cell includes the percentage identity among 2 sequences (horizontally to the left and vertically at the bottom). Key indicates pairwise identity percentages.
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