| finland | | diphyllobothrium ditremum | species | 1 | 0 |
| finland | savonia region | diphyllobothrium ditremum | species | 180 | 0 |
| japan | hokkaido prefecture | diphyllobothrium ditremum | species | 2 | 0 |
| norway | | diphyllobothrium ditremum | species | 6 | 0 |
| norway | more og romsdal county | diphyllobothrium ditremum | species | 0 | 2 |
| norway | nordland county | diphyllobothrium ditremum | species | 8 | 0 |
| russia | tyumen oblast | diphyllobothrium ditremum | species | 11 | 0 |
| united kingdom | | diphyllobothrium ditremum | species | 4 | 0 |
| united kingdom | scotland | diphyllobothrium ditremum | species | 6 | 0 |
| united states | | diphyllobothrium ditremum | species | 3 | 0 |