Volume 11, Number 8—August 2005
Dispatch
Evaluating Antibiograms To Monitor Drug Resistance
Mohamed El-Azizi*, Adnan Mushtaq*, Cheryl Drake†, Jerry Lawhorn†, Joan Barenfanger†, Steven Verhulst*, and Nancy Khardori*
Table A2
Comparison of susceptibility results of common gram-positive bacteria to selected antimicrobial agents in 4 regions of central Illinois*
| Organism/region (no. isolates tested) | % isolates susceptible (no. isolates reported) |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AMP | AMP/SUL | CFZ | CFT | LEV | TMP/SMX | CFO | OXA | PEN | ERY | CLN | TET | VAN | |
| Staphylococcus aureus | |||||||||||||
| West (2,201) | 7 (1,987) | 51 (1,932) | 72 (2,201) | – | 64 (1,803) | 97 (2,016) | – | 73 (2,201) | – | 51 (1,803) | 70 (2,201) | 93 (2,044) | 100 (2,201) |
| Southwest 982) | 12 (615) | 84 (774) | 81 (882) | – | 50 (553) | 95 (982) | – | 47 (777) | – | 42 (874) | 54 (974) | 91 (982) | 100 (982) |
| Central (5,313) | 14 (3,036) | 64 (1,969) | 62 (1,376) | – | 62 (4,650) | 99 (4,500) | – | 66 (5,344) | – | 48 (4,565) | 65 (5,340) | 96 (4,598) | 100 (5,199) |
| South (1,582) | 13 (1,582) | 50 (854) | 48 (1,582) | – | 45 (1,313) | 96 (1,582) | – | 45 (219) | – | 36 (1,582) | 50 (269) | 87 (1,363) | 100 (1,007) |
| p value | <0.0001 | <0.0001 | <0.0001 | – | <0.0001 | – | <0.0001 | – | <0.0001 | <0.0001 | <0.0001 | NA | |
| Streptococcus pneumoniae | |||||||||||||
| West (248) | – | – | – | 93 (240) | 99 (156) | – | 84 (245) | – | 67 (234) | 59 (93) | – | – | 100 (234) |
| Southwest (51) | – | – | – | 84 (51) | 80 (23) | – | 84 (51) | – | 74 (38) | 77 (13) | – | – | 96 (28) |
| Central (782) | – | – | – | 82 (319) | 99 (366) | – | 80 (366) | – | 64 (768) | 64 (630) | – | – | 100 (750) |
| South (223) | – | – | – | 96 (223) | 99 (121) | – | 66 (29) | – | 75 (16) | 52 (158) | – | – | 100 (86) |
| p value | – | – | – | <0.0001 | <0.0001 | – | 0.0843 | – | 0.4417 | 0.0256 | – | – | <0.0001 |
| Coagulase-negative staphylococci | |||||||||||||
| West (2,066) | 6 (1,868) | – | 32 (2,206) | – | 46 (2,066) | – | – | – | – | – | – | – | 100 (2,066) |
| Southwest (816) | 29 (729) | – | 73 (816) | – | 55 (816) | – | – | – | – | – | – | – | 100 (816) |
| Central (3,583) | 30 (716) | – | 24 (1,125) | – | 78 (1,473) | – | – | – | – | – | – | – | 100 (3,583) |
| South (97) | 8 (54) | – | 44 (54) | – | 64 (97) | – | – | – | – | – | – | – | 100 (97) |
| p value | <0.0001 | – | <0.0001 | – | <0.0001 | – | – | – | – | – | – | – | NA |
| Enterococcus faecalis | |||||||||||||
| West (803) | 97 (707) | – | – | – | 47 (803) | – | – | – | – | – | – | 43 (803) | 99 (803) |
| Southwest (414) | 84 (414) | – | – | – | 56 (136) | – | – | – | – | – | – | 44 (236) | 91 (414) |
| Central (3,797) | 94 (3,152) | – | – | – | 40 (2,087) | – | – | – | – | – | – | 41 (2,143) | 96 (3,763) |
| South (873) | 93 (873) | – | – | – | 32 (454) | – | – | – | – | – | – | 40 (579) | 96 (873) |
| p value | <0.0001 | – | – | – | <0.0001 | – | – | – | – | – | – | 0.5635 | <0.0001 |
| E. faecium | |||||||||||||
| West (273) | 20 (270) | – | – | – | – | – | – | – | – | – | – | 40 (286) | 32 (273) |
| Southwest (100) | 22 (100) | – | – | – | – | – | – | – | – | – | – | 30 (100 | NV |
| Central (215) | 22 (212) | – | – | – | – | – | – | – | – | – | – | 32 (56) | 55 (215) |
| South (419) | 68 (419) | – | – | – | – | – | – | – | – | – | – | 55 (125) | 73 (419) |
| p value | <0.0001 | – | – | – | – | – | – | – | – | – | – | 0.0065 | NA |
*AMP, ampicillin; AMP/SUL, ampicillin/sulbactam; CFZ, cefazolin; CFT, ceftriaxone; LEV, levofloxacin; TMP/SMX, trimethoprim/sulfamethoxazole; CFO, cefotaxime; OXA, oxacillin; PEN, penicillin; ERY, erythromycin; CLN, clindamycin; TET, tetracycline; VAN, vancomycin; NA, not applicable; NV, not available.
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