Tapeworm infection is caused by ingesting food or water contaminated with tapeworm eggs or larvae. If you ingest certain tapeworm eggs, they can migrate outside your intestines and form larval cysts in body tissues and organs (invasive infection). If you ingest tapeworm larvae, however, they develop into adult tapeworms in your intestines.
The Netherlands, and Spain, sporadic cases have been reported over the last 6 years, which were presumably linked to the consumption of raw imported fish. The extrapolated prevalence in netherlands, is found to be 16,032 for two times of 6,174,762 population estimation used.