Comparison of P. damselae subsp. damselae genomes. From the outer ring to the inner ring: RM-71, A-162, and LD-07. The genome of the type strain CIP 102761 was used as the reference for the comparison and is not drawn as it would constitute a continuous circle. Black lines are drawn to separate chromosomes and plasmids. Note that the CIP 102761 genome includes a large putative plasmid (pPHDD203), several smaller putative plasmids, and two phage regions, all of which are absent in the other three strains.