| argentina | | haemonchus placei argentinensis | subspecies | 20 | 0 |
| argentina | | haemonchus placei placei | subspecies | 5 | 0 |
| australia | | haemonchus placei | species | 1 | 0 |
| australia | | haemonchus placei placei | subspecies | 9 | 0 |
| australia | new south wales | haemonchus placei | species | 0 | 2 |
| australia | queensland | haemonchus placei | species | 2 | 4 |
| australia | south australia | haemonchus placei | species | 0 | 1 |
| australia | victoria | haemonchus placei | species | 0 | 1 |
| australia | western australia | haemonchus placei | species | 0 | 2 |
| brazil | | haemonchus placei | species | 153 | 0 |
| brazil | mato grosso | haemonchus placei | species | 0 | 1 |
| brazil | mato grosso do sul | haemonchus placei | species | 0 | 1 |
| brazil | rio grande do sul | haemonchus placei | species | 0 | 1 |
| brazil | santa catarina | haemonchus placei | species | 0 | 1 |
| brazil | sao paulo | haemonchus placei | species | 0 | 1 |
| burkina faso | | haemonchus placei africanus | subspecies | 9 | 0 |
| burkina faso | | haemonchus placei placei | subspecies | 1 | 0 |
| cameroon | | haemonchus placei | species | 4 | 0 |
| cameroon | east region | haemonchus placei | species | 8 | 0 |
| cape verde | | haemonchus placei africanus | subspecies | 3 | 0 |
| cape verde | | haemonchus placei placei | subspecies | 2 | 0 |
| france | | haemonchus placei | species | 1 | 0 |
| ghana | | haemonchus placei | species | 5 | 0 |
| india | | haemonchus placei | species | 2 | 0 |
| kenya | central province | haemonchus placei | species | 0 | 2 |
| mauritania | | haemonchus placei africanus | subspecies | 7 | 0 |
| mauritania | | haemonchus placei placei | subspecies | 4 | 0 |
| mexico | campeche | haemonchus placei | species | 0 | 1 |
| netherlands | | haemonchus placei | species | 95 | 0 |
| nigeria | | haemonchus placei | species | 65 | 0 |
| nigeria | lagos | haemonchus placei | species | 0 | 1 |
| solomon islands | | haemonchus placei | species | 0 | 1 |
| south africa | eastern cape province | haemonchus placei | species | 0 | 1 |
| south africa | free state province | haemonchus placei | species | 0 | 1 |
| south africa | limpopo province | haemonchus placei | species | 0 | 2 |
| south africa | mpumalanga province | haemonchus placei | species | 1 | 0 |
| tanzania | iringa region | haemonchus placei | species | 0 | 2 |
| united kingdom | scotland | haemonchus placei | species | 0 | 1 |
| united states | | haemonchus placei | species | 15 | 0 |
| united states | arkansas | haemonchus placei | species | 0 | 1 |
| united states | california | haemonchus placei | species | 0 | 1 |
| united states | florida | haemonchus placei | species | 10 | 0 |
| united states | georgia | haemonchus placei | species | 10 | 3 |
| united states | louisiana | haemonchus placei | species | 10 | 2 |
| united states | maine | haemonchus placei | species | 0 | 1 |
| united states | mississippi | haemonchus placei | species | 0 | 3 |
| united states | new jersey | haemonchus placei | species | 0 | 1 |
| united states | north carolina | haemonchus placei | species | 10 | 0 |
| united states | texas | haemonchus placei | species | 0 | 1 |
| united states | wyoming | haemonchus placei | species | 0 | 1 |
| uzbekistan | | haemonchus placei | species | 1 | 0 |