<prompt> Neisseria Meningitidis bacteria harbour normallySkinGenitalsNasopharynxLower GIT  <response>: N. Meningococci are capsulated Gram-negative diplococci Reservoir for N. Meningitidis- human nasopharynx is the only reservoir of meningococcus. N.meningitidis Most important source- carriers are the most imp source, not clinical cases. They are arranged in pairs with adjacent sides flattened --7 half moon shaped. Transport medium --7 Stuarts medium. Blood agar, chocolate agar and Mueller - Hinton agar is the media commonly used for culturing meningococci. Age group- 3 month-5 years Serotype- total 13, out of which serotype A, B, C are most important Serotype A- Epidemics Serotype B- Both epidemic and local outbreaks Serotype C- Local outbreaks Chemoprophylaxis has been suggested for close contacts. RIFAMPICIN is DOC for prophylaxis 