| Microorganism |
MIC50
(μg/ml) |
MIC90
(μg/ml) |
Range
(μg/ml) |
Antimicrobial |
Reference |
| Rhodococcus equi (macrolide-resistant + 48h) |
>4 |
>4 |
>4 － ? |
Erythromycin (E-mycin, Ery-tab, Benzamycin)  |
1042 |
| Rhodococcus equi (macrolide-resistant + 48h) |
>8 |
>8 |
≤0.5 － >8 |
Rifampicin (Rifampin) |
1042 |
| Rhodococcus equi (macrolide-resistant + 48h) |
>8 |
>8 |
>8 － ? |
Ceftiofur |
1042 |
| Rhodococcus equi (macrolide-resistant + 48h) |
>16 |
>16 |
16 － >16 |
Penicillin (Benzylpenicillin, Penicillin G, Bicillin C-R/L-A, Pfizerpen, Wycellin) |
1042 |
| Rhodococcus equi (macrolide-resistant + 48h) |
32 |
64 |
32 － 64 |
Chloramphenicol (Chloromycetin) |
1042 |
| Rhodococcus equi (macrolide-resistant + 48h) |
>64 |
>64 |
>64 － ? |
Tilmicosin |
1042 |
| Rhodococcus equi (macrolide-resistant + 48h) |
>64 |
>64 |
>64 － ? |
Tulathromycin |
1042 |
| Rhodococcus equi (macrolide-resistant) |
0.5 |
1 |
0.5 － 1 |
Vancomycin (Vancocyn, Lyphocin) |
1042 |
| Rhodococcus equi (macrolide-resistant) |
1 |
1 |
0.5 － 2 |
Gentamicin (Gentamycin, Garamycin) |
1042 |
| Rhodococcus equi (macrolide-resistant) |
1 |
1 |
0.5 － 2 |
Linezolid (PNU-100766, U-100766, Zyvox) |
1042 |
| Rhodococcus equi (macrolide-resistant) |
2 |
2 |
1 － 2 |
Enrofloxacin |
1042 |
| Rhodococcus equi (macrolide-resistant) |
2 |
4 |
0.5 － >4 |
Doxycycline (Doxycycline hyclate, Doxy, Vibra, Vibramycin) |
1042 |
| Rhodococcus equi (macrolide-resistant) |
>4 |
>4 |
0.5 － >4 |
Clarithromycin (Biaxin) |
1042 |
| Rhodococcus equi (macrolide-resistant) |
>4 |
>4 |
4 － >4 |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
1042 |
| Rhodococcus equi (macrolide-resistant) |
>4 |
>4 |
>4 － ? |
Azithromycin (Zithromax, Sumamed, Zitrocin) |
1042 |
| Rhodococcus equi (macrolide-resistant) |
>8 |
>8 |
≤0.5 － >8 |
Rifampicin (Rifampin) |
1042 |
| Rhodococcus equi (macrolide-resistant) |
>8 |
>8 |
1 － >8 |
Ceftiofur |
1042 |
| Rhodococcus equi (macrolide-resistant) |
>16 |
>16 |
16 － >16 |
Penicillin (Benzylpenicillin, Penicillin G, Bicillin C-R/L-A, Pfizerpen, Wycellin) |
1042 |
| Rhodococcus equi (macrolide-resistant) |
16 |
32 |
4 － 64 |
Chloramphenicol (Chloromycetin) |
1042 |
| Rhodococcus equi (macrolide-resistant) |
>32 |
>64 |
32 － >64 |
Tilmicosin |
1042 |
| Rhodococcus equi (macrolide-resistant) |
>64 |
>64 |
>64 － ? |
Tulathromycin |
1042 |
| Rhodococcus equi (macrolide-susceptible + 48h) |
0.12 |
0.25 |
≤0.06 － 0.5 |
Clarithromycin (Biaxin) |
1042 |
| Rhodococcus equi (macrolide-susceptible + 48h) |
≤0.5 |
≤0.5 |
≤0.5 － >8 |
Rifampicin (Rifampin) |
1042 |
| Rhodococcus equi (macrolide-susceptible + 48h) |
0.5 |
1 |
≤0.25 － 2 |
Vancomycin (Vancocyn, Lyphocin) |
1042 |
| Rhodococcus equi (macrolide-susceptible + 48h) |
1 |
1 |
0.5 － 1 |
Erythromycin (E-mycin, Ery-tab, Benzamycin) |
1042 |
| Rhodococcus equi (macrolide-susceptible + 48h) |
1 |
2 |
≤0.25 － 2 |
Gentamicin (Gentamycin, Garamycin) |
1042 |
| Rhodococcus equi (macrolide-susceptible + 48h) |
2 |
2 |
1 － 2 |
Linezolid (PNU-100766, U-100766, Zyvox) |
1042 |
| Rhodococcus equi (macrolide-susceptible + 48h) |
2 |
2 |
1 － >4 |
Enrofloxacin |
1042 |