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
[{'content': 'The tapeworm that can be transmitted directly from human to human is \nSelect and explain. \nA. Fish Tapeworm, B. Beef Tapeworm, C. Dog Tapeworm, D. Dwarf Tapeworm', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The adult Hymenolepis nana worm is very small, at perhaps 4 cm in length. The so-called "dwarf tapeworm" is the only tapeworm that can be transmitted directly from human to human.Eggs are ingested the fecal-oral route. They then release embryos that penetrate the intestinal wall. The resulting cysts mature in the intestinal wall, then reenter the gut lumen to develop into adult worms again.Ref: Sherris microbiology; 6th edition; Page no: 893', 'role': 'assistant'}]