The parasites on all pets can cause some problems in human. The parasites which are transmitted from pets to human are called zootonic parasites. Usually the parasites require a specific host. The parasites of human and pets are different. The external parasites of the pets can cause some allergic skin problems. The treatment of such allergic reactions can cause problem to the fetus if the victim is pregnant. There are some parasites which can be transferred from the feces of pets to hands and then to the humans. So take preventive measures while being around the pets. I advise you to get your puppy treated for the parasites.