About the Authors

Martin Reist

Affiliation Veterinary Public Health Institute, Vetsuisse Faculty University of Bern, Bern, Switzerland

Nadine Geser

Affiliation Institute for Food Safety and Hygiene, Vetsuisse Faculty University of Zurich, Zurich, Switzerland

Herbert Hächler

Affiliation Institute for Food Safety and Hygiene, Vetsuisse Faculty University of Zurich, Zurich, Switzerland

Sara Schärrer

Affiliation Veterinary Public Health Institute, Vetsuisse Faculty University of Bern, Bern, Switzerland

Roger Stephan

stephanr@fsafety.uzh.ch

Affiliation Institute for Food Safety and Hygiene, Vetsuisse Faculty University of Zurich, Zurich, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MR RS. Performed the experiments: NG HH RS. Analyzed the data: MR SS RS. Wrote the paper: MR SS RS.