Fig. 4From: Phenotypic zinc resistance does not correlate with antimicrobial multi-resistance in fecal E. coli isolates of pigletsComparison of MIC values for zinc; high-zinc supplementation group (zinc) and the background control (control) isolates from both trials. A Mann–Whitney U test comparing 114 isolates from zinc group and 96 isolates from control group (overall 210 isolates) showed no significant difference of zinc-MIC value between considered groups (P = 0.146)Back to article page