Figure 2.

Phylogenetic tree of the family Pasteurellaceae (Heyl, Jawetz, and Pasteurellaceae–other) based on partial rpoB gene sequences. *, P. pneumotropica isolates sequenced during the current study. Representative sequences from GenBank were included for comparison. Sequences were aligned by using Vector NTI software. The distance values calculated by using the Neighbor Joining method are indicated in parenthesis. The alignment tree suggests that P. pneumotropica clusters separately from Pasteurellaceae–other, although the distinction between Heyl and Jawetz biotypes was unclear.