FIG. 2.

Phylogenetic relationship of the representative isolates, clonal types (bold), and their closest relatives based on partial 16S rRNA gene sequences. Bootstrap values that were above 50% are shown at the nodes. The scale bar represents 1 substitution/10 nucleotides. E. coli (accession no. X80725) was used as the outgroup. Asterisks and shaded clusters indicate the representative isolates that were examined for their sensitivity to temperature and those that grew at −5°C, respectively. The accession numbers shown were previously reported in references 2, 4, 5, 11, 12, 14, 15, 18, 20, 22, 24, 25, 27, 29, 30, 34, and 37.