TABLE 1.
Antibiotic resistance of E. faecium NRRL B-2354a
| Class and antibiotic | MIC (mg/liter) | Sensitivity | No. of screened AR gene types from ARDBc |
|---|---|---|---|
| Aminoglycosides | |||
| Gentamicin | Sensitiveb | Sensitive | 737 |
| Streptomycin | Sensitiveb | Sensitive | 869 |
| Cephalosporins | |||
| Cefazolin | <2 | Sensitive | 1,393 |
| Cefoxitin | 8 | Sensitive | 844 |
| Glycopeptides | |||
| Vancomycin | <0.5 | Sensitive | 300 |
| Macrolides | |||
| Erythromycin | 2 | Intermediate | 1,092 |
| Penicillins | |||
| Ampicillind | <0.125 | Sensitive | 1,896 |
| Penicillin | <1 | Sensitive | 1,896 |
| Quinolones | |||
| Levofloxacin | 2 | Sensitive | 273 |
| Tetracyclines | |||
| Minocycline | <1 | Sensitive | 597 |
| Tetracycline | <0.5 | Sensitive | 597 |
a
The same results were found for E. faecium ATCC 8459.
b
Numerical MICs were not determined.
c
No AR genes were detected in our study; ARDB data are from reference 37.
d
Certain pbp5 genotypes are associated with ampicillin resistance in E. faecium, but they were not considered here because of the variation in ampicillin resistance and sensitivity phenotypes among strains containing this gene.