This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Human Immunodeficiency Virus, Subject name: Microbiology
Most common helminthic infection in AIDS is: 
Select and explain. 
A. Trichuris trichiura, B. Strongyloides stercoralis, C. Enterobius vermicularis, D. Nector-americanus
B: Strongyloides stercoralis
Answer: B: Strongyloides stercoralis 
Explanation: Ans. is 'b' i.e., Strongyloides stercoralis (Ref: Paniker Parasitology,6th/e, p. 173)* Amongst the given options only stongyloides causes opportunistic infection in AIDS.* Generalised strongyloidosis may be seen in AIDS.* Protozoa causing opportunistic infection are: Toxoplasma gondii, Isospora belli, Cryptosporidium species.