Figure 4.

A neighbor-joining phylogenetic tree constructed on the single-nucleotide polymorphisms (SNPs) in the core genome regions of the Propionibacterium avidum strains, including 5 P. avidum strains isolated from 4 patients with prosthetic joint infection (PJI) described in this study (clinical isolates 828, 853, 855, 878, 882), and previously sequenced strains (T13, T14, T15, ATCC25577, UCD-PD2, MJR7694, 44067, and TM16). Horizontal bar represents p-distances based on substitutions at the SNP sites. Bootstrap values are based on 500 replicates.