Emerging Infectious Disease ISSN: 1080-6059

The Rickettsia: an Emerging Group of Pathogens in Fish

John L. Fryer

and Michael J. Mauel

Author affiliations: Oregon State University, Corvallis, Oregon, USA

Figure 1

( 2% divergence) Phylogenetic relationships of Piscirickettsia salmonis, selected rickettsiae and bacteria. Evolutionary distances were calculated by the method of Jukes and Cantor (34). After eliminating regions of ambiguity and uncertain homology 1,313 positions of the 16S rDNA gene were compared.

Figure 1. ( 2% divergence) Phylogenetic relationships of Piscirickettsia salmonis, selected rickettsiae and bacteria. Evolutionary distances were calculated by the method of Jukes and Cantor (34). After eliminating regions of ambiguity and uncertain homology 1,313 positions of the 16S rDNA gene were compared.

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