One of your patients after returning from abroad has been diagnosed to have meningococcal meningitis. What immediate chemoprophylaxis will you advice for the patients close contacts?
**Core Concept**
Meningococcal meningitis is a severe infection caused by the bacterium *Neisseria meningitidis*, requiring prompt treatment and prevention of secondary cases among close contacts. Chemoprophylaxis is essential to prevent the spread of the disease.
**Why the Correct Answer is Right**
The correct answer is based on the most effective chemoprophylactic agent for meningococcal meningitis. *Neisseria meningitidis* can be effectively eradicated from the nasopharynx of close contacts using rifampicin (or rifampin), ciprofloxacin, or ceftriaxone, thereby preventing the spread of the disease.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details of option A, we cannot directly address its inaccuracies, but typically, incorrect options might include antibiotics that are not recommended for chemoprophylaxis against *Neisseria meningitidis*.
**Option B:** Similarly, without specifics, option B could be incorrect if it proposes an antibiotic with poor efficacy against meningococci or one that is not recommended for prophylaxis.
**Option D:** This option might suggest an inappropriate or less effective chemoprophylactic agent for meningococcal meningitis.
**Clinical Pearl / High-Yield Fact**
It's crucial to note that chemoprophylaxis should be initiated as soon as possible, ideally within 24 hours of identifying the index case, to effectively prevent secondary cases.
**Correct Answer:** Correct Answer: D. Rifampicin.