| anguilla | | ichthyophthirius multifiliis | species | 0 | 2 |
| australia | | ichthyophthirius multifiliis | species | 1 | 0 |
| brazil | amazonas | ichthyophthirius multifiliis | species | 0 | 11 |
| brazil | mato grosso | ichthyophthirius multifiliis | species | 0 | 3 |
| brazil | mato grosso do sul | ichthyophthirius multifiliis | species | 0 | 1 |
| brazil | rondonia | ichthyophthirius multifiliis | species | 0 | 1 |
| china | qinghai | ichthyophthirius multifiliis | species | 0 | 1 |
| china | tibet | ichthyophthirius multifiliis | species | 0 | 1 |
| finland | central finland region | ichthyophthirius multifiliis | species | 0 | 2 |
| india | | ichthyophthirius multifiliis | species | 8 | 0 |
| india | jammu and kashmir | ichthyophthirius multifiliis | species | 0 | 1 |
| maldives | | ichthyophthirius multifiliis | species | 0 | 1 |
| peru | amazonas region | ichthyophthirius multifiliis | species | 0 | 1 |
| taiwan | | ichthyophthirius multifiliis | species | 0 | 1 |
| turkey | | ichthyophthirius multifiliis | species | 17 | 0 |
| united states | | ichthyophthirius multifiliis | species | 1 | 0 |