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Equivalence of ceftriaxone and rifampicin in eliminating nasopharyngeal carriage of serogroup B Neisseria meningitidis.

The efficacy of ceftriaxone in eliminating nasopharyngeal carriage of Neisseria meningitidis was compared with that of rifampicin during an epidemic of serogroup B meningococcal disease in Auckland, New Zealand. Household contacts of cases had a throat swab taken and were randomized to treatment. Carriers had a repeat swab taken 6 days later to determine efficacy of treatment. Ceftriaxone (98.2%) was equivalent to rifampicin (97.6%) in eliminating serogroup B N. meningitidis. It is cheaper than rifampicin and has the advantage of full compliance and fewer contraindications, but its acceptability by patients may limit its use as a first-line prophylactic agent.