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.
Tapeworm infections is still present in spain, but compared with data from previous studies, it has shown a marked decrease in the historical Baltic areas of endemicity as well as in Poland, Romania, Sweden, and Norway. The extrapolated prevalence in spain, is found to be 10,032 for two times of 5,174,762 population estimation used.