Figure 2. Jukes-Cantor–derived phylogenetic tree based on sequence analysis of a selected region of the rpoB gene of Corynebacterium isolates, including 2 feline isolates from West Virginia, 2008 (ATCC BAA-1774, CD 450). Feline isolates had 100% identity with each other and 97.7% identity with C. diphtheriae biotypes gravis and belfanti. GenBank accession nos. given in parentheses. ATCC, American Type Culture Collection; CD, Centers for Disease Control and Prevention identifier number; NCTC, National Collection of Type Cultures. Scale bar indicates number of substitutions per site.