This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
[{'content': 'Following are transmitted by mosquito except - \nSelect and explain. \nA. Japanese encephalitis, B. Dengue fever, C. Yellow fever, D. Plague', 'role': 'user'}, {'content': "Answer: D \nExplanation: Plague is primarily and basically, a zoonosis caused by Y.pestis, involving rodents and fleas. It exists in natural foci and is transmitted by infected flea bites to humans living or intruding into the same ecological environment Plague occurs in many forms - enzootically, epizootically, sporadically and in epidemics anthroponotic and primary pneumonic forms. AGENT: Y. pestis Reservoir: Wild rodents Source of infection: Infected rodent, fleas and case of pneumonic plague. Park's Textbook of Preventive and Social Medicine, 25th Edition, Pg 319.", 'role': 'assistant'}]