<prompt> DOC for Meningococcal chemoprophylaxis is -PenicillinGentamicinRifampicinChloramphenicol  <response>: Ans. C. RifampicinClose household and kissing, HCWs contacts of individuals with meningococcal disease are at increased risk up to 1,000 times the rate for the general population of developing secondary disease.Chemoprophylaxis:a. Adults- Ciprofloxacin-500mg oral single dose OR Ceftriaxone-single dose IM or IV;b. Children-Rifampicin-4 doses over 2 days OR Ceftriaxone-single dose IM or IV.c. Pregnant- Ceftriaxone-single dose IM or IV. 