About the Authors

Karin Elfving

Affiliations Clinical Bacteriology, Department of Medical Sciences, Uppsala University Hospital, Uppsala, Sweden, Department of Clinical Microbiology, Falu Hospital, Falun, Sweden

Björn Olsen

Affiliations Infectious Diseases, Department of Medical Sciences, Uppsala University Hospital, Uppsala, Sweden, Section for Zoonotic Ecology and Epidemiology, Kalmar University, Kalmar, Sweden

Sven Bergström

Affiliation Department of Molecular Biology, Umeå University, Umeå, Sweden

Jonas Waldenström

Affiliations Infectious Diseases, Department of Medical Sciences, Uppsala University Hospital, Uppsala, Sweden, Section for Zoonotic Ecology and Epidemiology, Kalmar University, Kalmar, Sweden

Åke Lundkvist

Affiliation Swedish Institute for Infectious Disease Control, Solna, Sweden

Anders Sjöstedt

Affiliation Clinical Bacteriology, Department of Clinical Microbiology, Umeå University Hospital, Umeå, Sweden

Hans Mejlon

Affiliation Museum of Evolution, Uppsala University, Uppsala, Sweden

Kenneth Nilsson

kenneth.nilsson@medsci.uu.se

Affiliations Clinical Bacteriology, Department of Medical Sciences, Uppsala University Hospital, Uppsala, Sweden, Infectious Diseases, Department of Medical Sciences, Uppsala University Hospital, Uppsala, Sweden, Center of Clinical Research, Dalarna, Falun, Sweden, Department of Clinical Microbiology, Falu Hospital, Falun, Sweden

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KE BO SB JW L AS HM KN. Performed the experiments: KE HM. Analyzed the data: KE BO JW KN. Contributed reagents/materials/analysis tools: KN. Wrote the paper: KE KN.