This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infectious Disease Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Cyclo developmental stage is seen in: \nSelect and explain. \nA. Malaria, B. Filaria, C. Plague, D. Cholera', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e. Filaria This question is one of the most often repeated question in PG examsThere are three types of biological transmission by vectors :Propagative:The infectious agent merely multiplies in the vector but no change in form.eg.plague bacilli in rat fleas.Cyclopropogative:The agent changes in form and number.eg. malaria parasite in mosquito.Cyclo-developmental:The disease agent undergoes only development but no multiplication.eg. microfilaria in mosquito.", 'role': 'assistant'}]