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Table 3 Antibiotic breakpoints as defined by EUCAST (2017) and *the British Society of Antimicrobial Chemotherapy (2012) [50,51,52]

From: Distinct fermentation and antibiotic sensitivity profiles exist in salmonellae of canine and human origin

Antimicrobial MIC breakpoint (μg/ml) Interpretation of zone diameters (mm)
R> ≤S <R S≥
Ampicillin 8 8 14 14
Amoxicillin 8 8 14 14
Chloramphenicol 8 8 17 17
Gentamycin 4 2 14 17
Tetracycline* 2 1 19 24
Trimethaprim 4 2 15 18
  1. R = resistance; I = intermediate and S = sensitive