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
[{'content': 'Which of the following is a lung fluke? \nSelect and explain. \nA. Paragonimus westermani, B. Metagonimus yokogawai, C. Fasciola pulmanaritica, D. S. japonicum', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Paragonimus westermani is the major species of lung fluke that infects humans, causing paragonimiasis.\nThe species sometimes is called the Japanese lung fluke or oriental lung fluke.\xa0\nParagonimiasis is a food-borne parasitic infection caused by the lung fluke.\nIt may cause a sub-acute to chronic inflammatory disease of the lung.\xa0\nTransmission of the parasite P. westermani to humans and mammals primarily occurs through the consumption of raw or undercooked seafood.\xa0\nThere is no vector, but various snail and crab species serve as intermediate hosts.\xa0\nIn Japan and Korea, the crab species Eriocheir is an important item of food as well as a notable second intermediate host of the parasite from infection to oviposition (laying eggs) is 65 to 90 days.\xa0\nInfections may persist for 20 years in humans.', 'role': 'assistant'}]