Which of the following parasitic organisms is capable of causing autoinfection? _________________?
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Answer: D. Taenia solium
Explanation
Taenia solium is uniquely capable of causing internal autoinfection within the human digestive tract. Eggs released from adult tapeworms can hatch inside the gut, releasing larvae that penetrate tissue. This internal dissemination leads to cysticercosis, where larval cysts develop in human muscles and organs. Taenia solium is a pork tapeworm parasite that causes taeniasis and cysticercosis in human hosts. Autoinfection occurs when an infected individual inadvertently ingests their own parasite eggs directly. Cysticercosis can lead to severe neurological symptoms if larval cysts lodge within the central nervous system.
Good personal hygiene and thorough cooking of pork products prevent tapeworm infections and cysticercosis. Neurocysticercosis is a leading cause of acquired epilepsy in developing regions where the parasite is endemic. Diagnostic imaging and serological testing are essential for identifying larval cysts in affected patients. Option A represents Giardia lamblia, a protozoan parasite causing intestinal infections without autoinfection. Option B represents Isospora belli, a coccidian parasite causing diarrhea in immunocompromised hosts. Option C represents Balantidium coli, a large ciliated protozoan that infects the human large intestine.
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