Fig. 1From: Antimicrobial resistance in commensal Escherichia coli and Enterococcus spp. is influenced by production system, antimicrobial use, and biosecurity measures on Spanish pig farmsAntimicrobial resistance pattern in a Escherichia coli (148), b Enterococcus faecalis (34) and c enterococci other than E. faecalis (112) recovered from 37 Spanish pig farms. The isolates were clustered according to their antimicrobial resistance pattern using the unweighted pair group method with arithmetic mean (UPGMA) as hierarchical clustering method. For this purpose, the pheatmap package (Kolde, 2019) was used. Streptogramins antimicrobial class was excluded from the E. faecalis clustering due to its intrinsic resistanceBack to article page