Angiostrongylus vasorum, also known as French heartworm, is a species of parasitic nematode in the family Metastrongylidae. It causes the disease canine angiostrongylosis in dogs. It is not zoonotic, that is, it cannot be transmitted to humans. Not much is known about the biology of this species. These nematode worms are small and pinkish in color. The length is 14.0–20.5 mm. The width is 0.170-0.306 mm.