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Table 4 Antimicrobial compounds having significantly lower MICs in isolates able to grow in beer.

From: Susceptibility of Pediococcus isolates to antimicrobial compounds in relation to hop-resistance and beer-spoilage

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
  1. 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.
  2. b NR; MIC not reached, isolate could grow at highest concentration of antibiotic tested.