1 Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
2 National Reference Laboratory for foodborne Parasites, Center for Zoonoses and Environmental Microbiology, National Institute of Public Health and the Environment, Bilthoven, The Netherlands.
3 Department of Biomedical Sciences, Institute of Tropical Medicine, Antwerp, Belgium.