FIG. 1.

Phylogenetic relationships of Legionella species inferred from partial rpoB DNA sequences. This tree was constructed by the NJ method in PAUP (28). The species C. burnetii was used as an outgroup. The bootstrap values presented at corresponding branches were evaluated from 1,000 replications. Values below 50% are not indicated. The autofluorescence (BW, blue-white; YG, yellow-green; R, red), ubiquinone (A to F), and fatty acid (I to IV) groups of each Legionella species (8, 9, 13, 20, 30) are indicated at the right. Biochemical traits identical to phylogenetic grouping are represented in boxes. The scale bar represents 5 substitutions per 100 nucleotides.