<prompt> The drug of choice for treatment of meningococcal meningitis isPiperacillinCeftriaxoneAmpicillinMeropenem  <response>: Ans. b. CeftriaxoneRef: Goodman Gilman 13th EPI 035Ceftriaxone is the drug of choice for treatment of meningitis caused by H. influenza, N. meningitidis meningococcal meningitis and S. pneumoniae.Ampicillin is the drug of choice for treatment of meningitis caused by L. monocytogenes.Meningitis seen in post neurosurgery or penetrating head trauma patients caused by staphylococcus, Propionibacterium, pseudomonas or acinetobacter is treated by meropenemvancomycin.Note: For prophylaxis of meningococcal meningitis contacts or mass chemoprophylaxis ciprofloxacin is the drug of choice. Ceftriaxone though us the best drug for prophylaxis is not the drug of choice as it is a parenteral drug. 