Table 4.
Antimicrobial compounds having significantly lower MICs in isolates able to grow in beer.
| Antimicrobial compound | Median and Distribution of MIC (μg/ml) | p-valuea | |
|---|---|---|---|
| Grow in Beer | Cannot grow in beer | ||
| Ampicillin | 0.25 (0.12-4) | 2 (0.12-4) | < 0.01 |
| Ciprofloxacin | 2 (0.5-NRb) | 4 (0.5-NR) | < 0.01 |
| Gatifloxacin | 1 (0.25-8) | 4 (1-NR) | < 0.01 |
| Levofloxacin | 2 (0.5-NR) | 16 (1-NR) | < 0.05 |
| Oxacillin + 2% NaCl | 0.25 (0.25-4) | 1 (0.25-NR) | < 0.02 |
| Penicillin | 0.12 (0.12-NR) | 1 (0.06-NR) | < 0.01 |
| Synercid | 0.5 (0.12-1) | 1 (0.25-2) | < 0.05 |
| Trimethoprim/Sulfamethoxazole | 0.5/9.5 (0.5/9.5-NR) | R (0.5/9.5-NR) | < 0.05 |
ap-value corresponds to U-test statistic as derived from the non-parametric Mann-Whitney U-test which is designed to examine whether two samples of observations came from the same distribution.
b NR; MIC not reached, isolate could grow at highest concentration of antibiotic tested.