| Microorganism |
MIC50
(μg/ml) |
MIC90
(μg/ml) |
Range
(μg/ml) |
Antimicrobial |
Reference |
| Streptococcus spp. (serogroup B) |
≤0.03 |
≤0.03 |
≤0.03 － ? |
Penicillin (Benzylpenicillin, Penicillin G, Bicillin C-R/L-A, Pfizerpen, Wycellin)  |
43 |
| Streptococcus spp. (serogroup B) |
≤0.06 |
≤0.06 |
≤0.06 － ? |
Cefotaxime (Cephotaxime, Claforan) |
43 |
| Streptococcus spp. (serogroup B) |
≤0.06 |
≤0.06 |
≤0.06 － ? |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
496 |
| Streptococcus spp. (serogroup B) |
0.25 |
0.25 |
0.12 － 0.25 |
Cefixime (Suprax) |
267 |
| Streptococcus spp. (serogroup B) |
≤0.25 |
≤0.25 |
≤0.25 － ? |
Clindamycin (Cleocin) |
496 |
| Streptococcus spp. (serogroup B) |
0.25 |
0.25 |
0.25 － ? |
Quinupristin/Dalfopristin (Synercid) |
496 |
| Streptococcus spp. (serogroup B) |
0.25 |
0.5 |
0.12 － 0.5 |
Azithromycin (Zithromax, Sumamed, Zitrocin) |
496 |
| Streptococcus spp. (serogroup B) |
0.5 |
1 |
0.25 － 1 |
Vancomycin (Vancocyn, Lyphocin) |
43 |
| Streptococcus spp. (serogroup B) |
>0.5 |
>4 |
≤0.5 － >4 |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
43 |
| Streptococcus spp. (serogroup C) |
0.008 |
0.03 |
≤0.008 － 0.25 |
Telithromycin (HMR 3647, RU-66647, Ketek) |
496 |
| Streptococcus spp. (serogroup C) |
>0.06 |
>8 |
≤0.06 － >8 |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
496 |
| Streptococcus spp. (serogroup C) |
≤0.12 |
≤0.12 |
≤0.12 － >16 |
Clindamycin (Cleocin) |
18 |
| Streptococcus spp. (serogroup C) |
>0.12 |
>8 |
≤0.06 － >8 |
Azithromycin (Zithromax, Sumamed, Zitrocin) |
496 |
| Streptococcus spp. (serogroup C) |
≤0.25 |
≤0.25 |
≤0.25 － >8 |
Clindamycin (Cleocin) |
496 |
| Streptococcus spp. (serogroup C) |
0.25 |
0.5 |
0.25 － 0.5 |
Quinupristin/Dalfopristin (Synercid) |
496 |
| Streptococcus spp. (serogroup C, F,and G) |
0.12 |
0.5 |
≤0.015 － 0.5 |
Cefdinir (Omnicef, Cefdiel) |
267 |
| Streptococcus spp. (serogroup C, F,and G) |
0.12 |
2 |
≤0.015 － 2 |
Cefixime (Suprax) |
267 |
| Streptococcus spp. (serogroup F) |
≤0.12 |
≤0.12 |
≤0.12 － >16 |
Clindamycin (Cleocin) |
18 |
| Streptococcus spp. (serogroup G) |
0.015 |
0.06 |
≤0.008 － 0.06 |
Telithromycin (HMR 3647, RU-66647, Ketek) |
496 |
| Streptococcus spp. (serogroup G) |
>0.06 |
>8 |
≤0.06 － >8 |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
496 |
| Streptococcus spp. (serogroup G) |
≤0.12 |
≤0.12 |
≤0.12 － >16 |
Clindamycin (Cleocin) |
18 |
| Streptococcus spp. (serogroup G) |
≤0.25 |
≤0.25 |
≤0.25 － >16 |
Clindamycin (Cleocin) |
496 |
| Streptococcus spp. (serogroup G) |
0.25 |
0.5 |
0.25 － 0.5 |
Quinupristin/Dalfopristin (Synercid) |
496 |
| Streptococcus spp. (serogroup G) |
>0.5 |
>8 |
0.25 － >8 |
Azithromycin (Zithromax, Sumamed, Zitrocin) |
496 |
| Streptococcus spp. (Viridans group) |
0.016 |
0.12 |
≤0.008 － 2 |
Imipenem |
493 |
| Streptococcus spp. (Viridans group) |
0.03 |
0.03 |
0.008 － 0.06 |
PD 0305970 |
225 |
| Streptococcus spp. (Viridans group) |
0.03 |
0.06 |
0.015 － 0.06 |
PD 0326448 |
225 |
| Streptococcus spp. (Viridans group) |
0.03 |
0.12 |
0.008 － 0.5 |
Tigecycline (GAR-936, Tigacyl) |
462 |