Since A. caninum is a hookworm that mainly infects dogs, is it possible that only the symptoms will be needed to be treated once it does infect humans?
It is already known by Medicine, and this is named larva migrans. Those worms will cave a path under the skin for several weeks until they die. Sometimes, larva migrans can attack the gut, and can provoke a serious disease.
Luckily larva migrans are easy treatable with ivermectin, albendazole, nitazoxanide, either topic or orally taken.
Yes, only symptoms need to be treated. The larvae will not develop into adult worms, but migrate through the epithelium for 2 - 3 weeks; the they will die.
Treatment can be done as Dario mentions in his response above, or with thiabendazole in an ointment formulation.
Larva migrans is not a severe and dangerous disease for humans.