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
Parasitic intestinal infestation seen in immunosuppressed patient is - 
Select and explain. 
A. Giardiasis, B. Ascariasis, C. Liver fluke, D. Strongyloides
D: Strongyloides
Answer: D: Strongyloides 
Explanation: Ans. is 'd' i.e., Strongyloides Stroneyloides stercorolis It is an impoant oppounistic pathogen in immunocompromised host. Habitat Small intestine (duodenum and jejunum). . Infective form Filariform larva . Modes of infection - Penetration of skin by filariform larva in soil. - Autoinfection Remember S. stercoralis is a pahenogenic worm ie, female is able to produce feile eggs or larvae without meeting with males.