TABLE 2.

Comparative core- and pan-genome analysis of the genera Francisella, Legionella, and Piscirickettsia.

Genus	Complete genomes	Representative genome set*	Core-genome (no. genes)	Pan-genome (no. genes)	Core-genome/mean no. CDS (%)
Francisella	63	26	692	4053	36.1
Legionella#	77	35	886	8413	29.2
Piscirickettsia##	19	19	1732	3463	-
Piscirickettsia###	19	2 + 1	1324	4178	44.2

*A representative genome set was used for the analysis (for details see section “Materials and Methods). ^#The genome of the Legionella endosymbiont of Polyplax serrata was excluded (Comment: Symbiotic bacterium from the lice of the genus Polyplax). ^##Pan-Genome analysis of Piscirickettsia salmonis by Nourdin-Galindo et al. (2017). ^###For the genus Piscirickettsia, the sequenced genomes are derived from two species: Piscirickettsia salmonis (complete genomes exist for the different strains) and Piscirickettsia litoralis (only a scaffold genome exist for the single strain).