| Microorganism |
MIC50
(μg/ml) |
MIC90
(μg/ml) |
Range
(μg/ml) |
Antimicrobial |
Reference |
| Haemophilus influenzae |
≤2 |
≤2 |
≤2 － >16 |
Chloramphenicol (Chloromycetin)  |
500 |
| Haemophilus influenzae |
≤2 |
≤2 |
≤2 － >16 |
Tetracycline (Sumycin, Achromycin V, Steclin) |
500 |
| Haemophilus influenzae |
<2 |
<2 |
<2 － >16 |
Tetracycline (Sumycin, Achromycin V, Steclin) |
85 |
| Haemophilus influenzae |
2 |
4 |
0.001 － 16 |
Cethromycin (ABT-773) |
950 |
| Haemophilus influenzae |
2 |
4 |
0.001 － >=64 |
Azithromycin (Zithromax, Sumamed, Zitrocin) |
950 |
| Haemophilus influenzae |
2 |
4 |
0.002 － >32 |
Telithromycin (HMR 3647, RU-66647, Ketek) |
954 |
| Haemophilus influenzae |
2 |
4 |
0.002 － >32 |
Telithromycin (HMR 3647, RU-66647, Ketek) |
954 |
| Haemophilus influenzae |
2 |
4 |
0.002 － >32 |
Telithromycin (HMR 3647, RU-66647, Ketek) |
1113 |
| Haemophilus influenzae |
2 |
4 |
<0.01 － 8 |
Azithromycin (Zithromax, Sumamed, Zitrocin) |
948 |
| Haemophilus influenzae |
2 |
4 |
0.03 － 8 |
HMR 3667 |
125 |
| Haemophilus influenzae |
2 |
4 |
0.03 － 8 |
HMR 3667 |
125 |
| Haemophilus influenzae |
2 |
4 |
0.03 － 16 |
Quinupristin/Dalfopristin (Synercid) |
125 |
| Haemophilus influenzae |
2 |
4 |
0.03 － 16 |
Telithromycin (HMR 3647, RU-66647, Ketek) |
948 |
| Haemophilus influenzae |
2 |
4 |
≤0.12 － >4 |
Telithromycin (HMR 3647, RU-66647, Ketek) |
499 |
| Haemophilus influenzae |
2 |
4 |
≤0.12 － >8 |
Erythromycin A |
499 |
| Haemophilus influenzae |
2 |
4 |
0.5 － 8 |
Imipenem |
1491 |
| Haemophilus influenzae |
2 |
4 |
0.5 － >8 |
SCH27899 |
129 |
| Haemophilus influenzae |
2 |
4 |
0.5 － 8 |
Telithromycin (HMR 3647, RU-66647, Ketek) |
1113 |
| Haemophilus influenzae |
2 |
4 |
? － ? |
Rifalazil (ABI-1648, KRM-1648) |
1082 |
| Haemophilus influenzae |
2 |
16 |
≤1 － 64 |
Cefaclor (Ceclor, Ceclor CD) |
499 |
| Haemophilus influenzae |
2 |
32 |
≤0.25 － >32 |
Cefaclor (Ceclor, Ceclor CD) |
500 |
| Haemophilus influenzae |
2 |
>256 |
0.016 － >256 |
Clindamycin (Cleocin) |
1544 |
| Haemophilus influenzae |
≤4 |
≤4 |
≤4 － >16 |
Tetracycline (Sumycin, Achromycin V, Steclin) |
412 |
| Haemophilus influenzae |
4 |
8 |
0.015 － >64 |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
954 |
| Haemophilus influenzae |
4 |
8 |
0.015 － >64 |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
1113 |
| Haemophilus influenzae |
4 |
8 |
≤0.25 － >32 |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
500 |
| Haemophilus influenzae |
4 |
8 |
1 － 16 |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
15 |
| Haemophilus influenzae |
4 |
8 |
1 － 32 |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
1113 |