Answers:
Parvo, no, it is a dog virus. There is a strain that humans can attain, but not from a dog. Some worms yes. Ringworm, roundworm, hookworm, cartridge worm... yes. I am not sure in the order of heartworm however.
Worms yes parvo no but if your animal have parvo the virus stays around for a long time so if you return with any animals they will stop it again!