Fig. 2

Antimicrobial resistance characteristics of the 33 swine-origin MCRPEC isolates from swine E. coli. a Antimicrobial resistance proportion, the bar chart showed the percentages of the 33 MCRPEC isolates that were sensitive (green), intermediate (yellow), or resistant (red) to 27 commonly used antimicrobials. b Statistics of the multi-antimicrobial category. c The first panel consists of 27 columns representing the sensitivity (green), intermediates (yellow), or resistance (red) of 27 antimicrobial agents. The next panel contains 18 columns indicating the antimicrobial category of the 33 MCRPEC isolates, including A: aminoglycosides, B: anti-MRSA cephalosporins, C: antipseudomonal penicillins + β-lactamase inhibitors, D: carbapenems, E: 1st and 2nd generation cephalosporins, F: 3rd and 4th generation cephalosporins, G: cephamycins, H: fluoroquinolones, I: folate pathway inhibitors, J: glycylcyclines, K: monobactams, L: penicillins, M: penicillins + β-lactamase inhibitors, N: phenicols, O: phosphonic acids, P: polymyxins, Q: tetracyclines, and R: Macrolides. The colors indicate resisitance to all kinds agents of one antimicrobial category (black), resistant to some of the agents of one antimicrobial category (gray), no agent (white). The rightmost section are judgments for MDR, XDR, or PDR. Multidrug resistant (MDR) is the acquired (but not natural) insensitivity (mediated or resistant) to three or more antimicrobial agents (at least one in each category). Extensive resistant (XDR) means that it is insensitive to all antimicrobial species (at least one in each category) except for those in the 1–2 category. PDR is defined as non-susceptibility to all agents in all antimicrobial categories. The MICs of antimicrobial resistance test were putted in supplementary material Table 4