1. Institute for Hygiene and Infectious Diseases of Animals, Justus Liebig University Gießen, Frankfurter Str. 89, 35392 Gießen, Germany
2. Biebertaler Blutegelzucht GmbH, Talweg 31, 35444 Biebertal, Germany
3. Friedrich-Loeffler-Institut/Federal Research Institute for Animal Health, Institute of Molecular Pathogenesis, Naumburger Str. 96a, 07743 Jena, Germany