The treponemes infecting lagomorphs include Treponema paraluisleporidarum ecovar Cuniculus (TPeC) and ecovar Lepus (TPeL), infecting rabbits and hares, respectively. In this study, we described the first complete genome sequence of TPeL, isolate V3603-13, from an infected mountain hare (Lepus timidus) in Sweden. In addition, we determined 99.0% of the genome sequence of isolate V246-08 (also from an infected mountain hare, Sweden) and 31.7% of the genome sequence of isolate Z27 A77/78 (from a European hare, Lepus europeaus, The Netherlands). The TPeL V3603-13 genome had considerable gene synteny with the TPeC Cuniculi A genome and with the human pathogen T. pallidum, which causes syphilis (ssp. pallidum, TPA), yaws (ssp. pertenue, TPE) and endemic syphilis (ssp. endemicum, TEN). Compared to the TPeC Cuniculi A genome, TPeL V3603-13 contained four insertions and 11 deletions longer than three nucleotides (ranging between 6 and2,932 nts). In addition, there were 25 additional indels, from one to three nucleotides long, altogether spanning 36 nts. The number of single nucleotide variants (SNVs) between TPeC Cuniculi A and TPeL V3603-13 were represented by 309 nucleotide differences. Major proteome coding differences between TPeL and TPeC were found in the tpr gene family, and (predicted) genes coding for outer membrane proteins, suggesting that these components are essential for host adaptation in lagomorph syphilis. The phylogeny revealed that the TPeL sample from the European brown hare was more distantly related to TPeC Cuniculi A than V3603-13 and V246-08.

Department of Biology Faculty of Medicine Masaryk University Brno Czech Republic

Department of Biomedical Engineering Brno University of Technology Brno Czech Republic

Department of Microbiology and Antimicrobial Resistance Veterinary Research Institute Brno Czech Republic

Department of Pathology and Wildlife Diseases National Veterinary Institute Uppsala Sweden

Division of Zoological Medicine Department of Clinical Sciences of Companion Animals Faculty of Veterinary Medicine Utrecht University Utrecht The Netherlands

Institute of International Animal Health One Health Friedrich Loeffler Institut Federal Research Institute for Animal Health Greifswald Insel Riems Germany

Professorship for International Animal Health One Health Faculty of Veterinary Medicine Justus Liebig University Giessen Germany

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