| australia | | trichostrongylus vitrinus | species | 10 | 0 |
| australia | new south wales | trichostrongylus vitrinus | species | 0 | 3 |
| australia | queensland | trichostrongylus vitrinus | species | 0 | 2 |
| australia | south australia | trichostrongylus vitrinus | species | 0 | 2 |
| australia | western australia | trichostrongylus vitrinus | species | 0 | 1 |
| chile | los rios region | trichostrongylus vitrinus | species | 0 | 1 |
| france | centre region | trichostrongylus vitrinus | species | 0 | 1 |
| iran | ardabil province | trichostrongylus vitrinus | species | 1 | 0 |
| iran | gilan province | trichostrongylus vitrinus | species | 6 | 0 |
| iran | khuzestan province | trichostrongylus vitrinus | species | 3 | 0 |
| italy | piemonte region | trichostrongylus vitrinus | species | 0 | 1 |
| italy | sardinia autonomous region | trichostrongylus vitrinus | species | 1 | 0 |
| russia | moscow oblast | trichostrongylus vitrinus | species | 3 | 0 |
| south africa | kwazulu-natal province | trichostrongylus vitrinus | species | 0 | 1 |
| spain | andalusia | trichostrongylus vitrinus | species | 0 | 1 |
| turkey | sanliurfa province | trichostrongylus vitrinus | species | 0 | 1 |
| united kingdom | | trichostrongylus vitrinus | species | 1 | 0 |
| united kingdom | scotland | trichostrongylus vitrinus | species | 1 | 3 |
| united states | california | trichostrongylus vitrinus | species | 0 | 1 |