Table 2.

MIC distributions of 10 antimicrobial agents against 140 Salmonella Derby isolates, non-wildtype population, and resistance

^aAntimicrobial agents tested: ampicillin (AsMP), cefotaxime (CTX), ceftazidime (CTZ), ciprofloxacin (CIP), colistin (CL), florfenicol (FLF), gentamicin (GEN), nalidixic acid (NAL), streptomycin (STR), and tetracycline (TET)

^bNon-wildtype (nWT) isolates, according to ECOFF values

^cResistant isolates (R), according to clinical breakpoints

Black vertical lines indicate the ECOFF values and dotted vertical lines indicate the clinical breakpoints, when they are different

Concentrations not included in the test panel are shaded grey