<prompt> Neisseria Meningitidis bacteria harbour normally:SkinGenitalsNasopharynxLower GIT  <response>: Ans. c NasopharynxRef: Microbiology by Ananthanarayan and Paniker 8th ed. 224-25; K. Park 20th ed. 150,151 N. Meningococci are capsulated Gram negative diplococci Reservoir for N. Meningitides- human nasopharynx is 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 Muller - Hinton agar are 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 out breaks Serotype C- Local out breaks Chemoprophylaxis has been suggested for close contacts. RIFAMPICIN is DOC for prophylaxis. 