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
Which of the following is TRUE regarding Neisseria meningitidis infection? 
Select and explain. 
A. It is the most common cause of meningitis in children, B. All strains are uniformly sensitive to sulfonamides, C. Vaccines are contraindicated in immunosuppressed, D. In India serotype B is most common cause
A: It is the most common cause of meningitis in children
Answer: A: It is the most common cause of meningitis in children 
Explanation: For children >3 months old, the most common organisms are S. pneumoniae, Neisseria meningitidis, and Staphylococcus aureus, with a lower incidence of S. pneumoniae meningitis since routine vaccinations with the conjugate vaccine. Penicillin has long been the treatment of choice for meningococcal infections and sulfonamides are used only for chemoprophylaxis because of resistance. Serogroup A epidemics have been largely confined to tropical countries. Both MCV4 and MPSV4 can be given to individuals who are immunosuppressed. Ref: Ray C.G., Ryan K.J. (2010). Chapter 30. Neisseria. In C.G. Ray, K.J. Ryan (Eds), Sherris Medical Microbiology, 5e.