This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology, Subject name: Microbiology
The cause of larva currens: 
Select and explain. 
A. Strongyloides stercoralis, B. Necator americanus, C. Ankylostoma duodenale, D. H. nana
A: Strongyloides stercoralis
Answer: A: Strongyloides stercoralis 
Explanation: Ans. is 'a' i.e., Strongyloides stercoralis(Ref: Harrison, 19th/e, p.1415)* The migrating filariform larva of Strongyloides moves rapidly in a short line at the rate of 3-4 cm in an hour, hence it is termed "larva currens".