Can Humans Get Heartworms from Dogs? Dirofilaria immitis is a species of parasitic worm better known by pet owners as heartworms. Heartworm larvae can grow into adult worms in your dog’s blood and block major blood vessels.
Dirofilaria immitis, the heartworm or dog heartworm, is a parasitic roundworm that is a type of filarial worm, a small thread-like worm, that causes dirofilariasis.
In rare cases, heartworms have infected people, but it does not complete its life cycle. The heartworm will migrate to the lung and cause a round.
The worms are called “heartworms” because the adults live in the heart, lungs, and associated blood vessels of an infected animal.