TABLE 2.
Antimicrobial susceptibility for E. faecalis (n = 111) isolated on nonselective media by antimicrobial and isolation sourcea
| Antimicrobial class | Percentage of resistant isolates (total no. of isolates): |
||||||
|---|---|---|---|---|---|---|---|
| Antimicrobialb | After hide removal (H) | After final washing (W) | Conveyor belt (C) | Ground beef from processing facility (G) | Ground beef from retail (R) | Total | |
| Aminoglycosides | GEN | 11.1% (2) | 0 | 0 | 0 | 0 | 1.8% (2) |
| KAN | 11.1% (2) | 0 | 0 | 0 | 0 | 1.8% (2) | |
| STR | 11.1% (2) | 0 | 0 | 0 | 0 | 1.8% (2) | |
| Fluoroquinolones | CIP | 5.6% (1) | 0 | 28.6% (2) | 11.8% (4) | 11.6% (5) | 10.8% (12) |
| Lincosamides | LIN | 100% (18) | 100% (9) | 100% (7) | 94.1% (32) | 97.7% (42) | 97.3% (108) |
| Lipopeptides | DAP | 0 | 0 | 0 | 5.9% (2) | 0 | 1.8% (2) |
| Macrolides | ERY | 11.1% (2) | 11.1% (1) | 0 | 14.7% (5) | 4.6% (2) | 9.0% (10) |
| TYL | 11.1% (2) | 0 | 0 | 2.9% (1) | 2.3% (1) | 3.6% (4) | |
| Phenicols | CHL | 11.1% (2) | 0 | 0 | 0 | 0 | 1.8% (2) |
| Streptogramins | SYN | 94.4% (17) | 77.7% (7) | 100% (7) | 94.1% (32) | 93.0% (40) | 92.8% (103) |
| Tetracyclines | TET | 11.1% (2) | 11.1% (1) | 14.3% (1) | 50.0% (17) | 25.6% (11) | 28.8% (32) |
a
Values represent percentage of isolates that are resistant and numbers in parentheses indicate total number of isolates. None of the isolates were resistant to linezolid, nitrofurantoin, penicillin, tigecycline, or vancomycin.
b
CHL, chloramphenicol; CIP, ciprofloxacin; DAP, daptomycin; ERY, erythromycin; GEN, gentamicin; KAN, kanamycin; LIN, lincomycin; STR, streptomycin; SYN, quinupristin-dalfopristin; TET, tetracycline; TYL, tylosin.