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': 'Neisseria Meningitidis bacteria harbour normally \nSelect and explain. \nA. Skin, B. Genitals, C. Nasopharynx, D. Lower GIT', 'role': 'user'}, {'content': "Answer: C \nExplanation: • N. Meningococci are capsulated Gram-negative diplococci\n• Reservoir for N. Meningitidis- human nasopharynx is the only reservoir of meningococcus. (N.meningitidis)\n• Most important source- carriers are the most imp source, not clinical cases.\n• They are arranged in pairs with adjacent sides flattened --7 half moon shaped.\n• Transport medium --7 Stuart's medium. \n• Blood agar, chocolate agar and Mueller - Hinton agar is the media commonly used for culturing meningococci.\n• Age group- 3 month-5 years \n• Serotype- total 13, out of which serotype A, B, C are most important\n■ Serotype A- Epidemics\n■ Serotype B- Both epidemic and local outbreaks\n■ Serotype C- Local outbreaks \n• Chemoprophylaxis has been suggested for close contacts.\n• RIFAMPICIN is DOC for prophylaxis", 'role': 'assistant'}]