<prompt> Auto infection occurs inH.nanaE. vermicularisT. soliumAll of the above  <response>: The infection of a primary host with a parasite, particularly a helminth, in such a way that the complete life cycle of the parasite happens in a single organism, without the involvement of another host is called autoinfection. Autoinfection occurs by scratching the perianal area and transferring infective eggs to the mouth with contaminated hands. Dwarf tapeworm Hymenolepis nana, also known as Rodentolepis nana, Vampirolepis nana, Hymenolepis fraterna, and Taenia nana is a cosmopolitan species though most common in temperate zones, and is one of the most common cestodes infecting humans, especially children. Infection is acquired most commonly from eggs in the feces of another infected individual, which are transferred in food, by contamination. Direct contaminative infection by eggs is probably the most common route in human cases.The nematode roundworm Enterobius vermicularis is widely known as the human pinworm due to the females long, pointed tail. Infection occurs via self-inoculation transferring eggs to the mouth with hands that have scratched the perianal area or through exposure to eggs in the environment e.g. contaminated surfaces, clothes, bed linens, etc.Taeniasis in humans is a parasitic infection caused by the tapeworm species Taenia saginata beef tapeworm, Taenia solium pork tapeworm, and Taenia asiatica Asian tapeworm. Humans can become infected with these tapeworms by eating raw or undercooked beef T. saginata or pork T. solium and T. asiatica. People with taeniasis may not know they have a tapeworm infection because symptoms are usually mild or nonexistent.Taenia solium tapeworm infections can lead to cysticercosis, which is a disease that can cause seizuresRef : 