Volume 13, Number 8—August 2007
Research
Human Noroviruses in Swine and Cattle
Figure 1

Figure 1. Unrooted neighbor-joining phylogenetic tree of representative noroviral strains and reference strains based on 172 bp of the RNA-dependent RNA polymerase region. GenBank accession nos. are indicated for the 5 reference strains (plain type), and the C-EnterNet sample codes are indicated for the representative strains identified in this study (boldface type). Bootstrap values are shown as percentages along the central branches