Fig. 2From: Phenotypic zinc resistance does not correlate with antimicrobial multi-resistance in fecal E. coli isolates of pigletsComparison of MIC values for zinc; multi-drug resistant and not-multi-drug resistant isolates of both trials. A Mann–Whitney U test comparing 63 MDR isolates and 147 NMDR isolates (overall 210 isolates) showed no significant difference of zinc-MIC value between considered groups (P = 0.085)Back to article page