This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Autoinfection can be caused by all the following helminths except: 
Select and explain. 
A. Enterobius vermicularis, B. Hymenolepis nana, C. Taenia solium, D. Ascaris lumbricoides
D: Ascaris lumbricoides
Answer: D: Ascaris lumbricoides 
Explanation: Ans: D. Ascaris lumbricoidesAutoinfection:Infection of a primary host with a parasite, paicularly 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.Primary host is at the same time the secondary host of parasite.Autoinfection is seen in (CHEST)Cryptosporidium parvumdegHymenolepis nanadegEnterobius vermicularisQStrongyloides stercoralisdegTaenia soliumdeg