1. Biology Institute; Eco-epidemiology Laboratory; University of Neuchâtel; Neuchâtel Switzerland
2. Veterinary Public Health Institute; University of Bern; Bern Switzerland
3. Centre for Fish and Wildlife Health; University of Bern; Bern Switzerland
4. Swiss Federal Veterinary Office; Liebefeld Switzerland
5. Lausanne University Hospital; Infectious Diseases Service; Lausanne Switzerland
6. Galli-Valerio Institute; Lausanne Switzerland