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. Author manuscript; available in PMC: 2020 Nov 26.
Published in final edited form as: J Med Microbiol. 2019 Apr 17;68(5):711–719. doi: 10.1099/jmm.0.000973

Table 2. EUCAST interpretive criteria of fosfomycin and amikacin for Enterobacteriaceae.

MIC (μg/ml) Zone Diameter Breakpoints (mm)
Susceptible Intermediate Resistant Susceptible Intermediate Resistant
Fosfomycin ≤32 >32 ≥24* NA <24*
Amikacin ≤16 32 ≥64 ≥17 15-16 ≤14
Gentamicin ≤4 8 ≥16 ≥15 13-14 ≤12
Ampicillin ≤8 16 ≥32 ≥17 14-16 ≤13
Ceftriaxone ≤1 2 ≥4 ≥23 20-22 ≤19
Imipenem ≤1 2 ≥4 ≥23 20-22 ≤19
*

For E. coli only. NA: Not Available