ancylostomiasis and ascariasis in dogswill it go to humans does it going to people,hurt us

If it had demodectic 'mange', then your decision would be understandable. Treatment of that can take a long time and be expensive, but the success rate is much higher now than it was in years past. It is not AT ALL contagious to humans, however. But most shelters euthanize these animals due to the expense of treatment. (Unless you are seeing a DVM on Park Avenue in Manhattan, however.it rarely approaches anywhere NEAR $650.)

If it had sarcoptic 'mange' (scabies), then that also could have been very easily and inexpensively treated. Although HIGHLY contagious among animals of the same species, it is not "contagious" to humans (humans have their own species of scabies mite).but direct contact with an infested animal can cause a temporary rash when the mites get on the human skin and then die. Fortunately, that's no longer an issue a mere day or two after treatment, even though it takes longer than that for the skin to clear up.

Was a skin scraping done actually done to confirm one of the two types of 'mange' listed above? If not, the dog might simply have had dermatitis due to contact with the hookworm larvae, if it lived in a dirty, muddy area. Again..easily corrected. There are also other common dermatologic problems that are often mistaken for 'mange' because they look alike, yet proper diagnosis was not sought. I'm assuming that since your DVM said to take the dog back, that a skin scraping WAS done to confirm Demodex? If so, you could have sought a second opinion on treatment. (In case it happens again, please consider doing that before breaking the bond of a young child and a dog.)