Given the fact that the use of rifampin in an outbreak setting might lead to the circulation of isolates resistant to rifampin, use of ciprofloxacin or ceftriaxone should be considered.Placebo-controlled trials do not seem ethical as prophylactic treatment has been proven to reduce the risk of disease among household contacts. More trials comparing the effectiveness of ceftriaxone, ciprofloxacin and rifampin for eradicating N. meningitidis could provide important insights.