Volume 11, Number 6—June 2005
Dispatch
Rifampin-resistant Meningococcal Disease
Table 2
Antimicrobial drug susceptibilities for meningococcal invasive disease Neisseria meningitidis isolates, Minnesota, USA, 1993–2003*
Antimicrobial drug susceptibility† | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 |
---|---|---|---|---|---|---|---|---|---|---|---|
Rifampin | 100 | 100 | 100 | 97 | 100 | 100 | 100 | 100 | 100 | 97 | 100 |
Ceftriaxone | NA | NA | NA | NA | NA | 100 | 100 | 100 | 100 | 100 | 100 |
Ciprofloxacin | NA | NA | NA | NA | NA | 100 | 100 | 100 | 100 | 100 | 100 |
Chloramphenicol | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
Meropenem | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
Penicillin | 92 | 100 | 81 | 89 | 92 | 83 | 96 | 95 | 96 | 86 | 93 |
Trimethoprim-sulfamethoxazole | 30 | 55 | 74 | 62 | 32 | 42 | 29 | 36 | 52 | 58 | 66 |
No. of cases | 27 | 23 | 30 | 40 | 40 | 36 | 56 | 22 | 27 | 36 | 29 |
No. of isolates tested (%) | 13 (48) | 11 (48) | 27 (90) | 37 (93) | 38 (95) | 36 (100) | 55 (98) | 22 (100) | 27 (100) | 36 (100) | 29 (100) |
*NA, not available.
†Values for antimicrobial drugs are % of isolates susceptible by broth microdilution.