| united states | | heterobilharzia americana | species | 4 | 0 |
| united states | florida | heterobilharzia americana | species | 0 | 2 |
| united states | georgia | heterobilharzia americana | species | 0 | 1 |
| united states | indiana | heterobilharzia americana | species | 0 | 1 |
| united states | kansas | heterobilharzia americana | species | 0 | 3 |
| united states | louisiana | heterobilharzia americana | species | 2 | 6 |
| united states | north carolina | heterobilharzia americana | species | 0 | 1 |
| united states | oklahoma | heterobilharzia americana | species | 0 | 1 |
| united states | south carolina | heterobilharzia americana | species | 0 | 1 |
| united states | texas | heterobilharzia americana | species | 2 | 7 |
| united states | utah | heterobilharzia americana | species | 1 | 0 |