Table 5

MICs distribution of 10 antibiotics for the 9 enterococcal strains
Antibiotics Number of strains with the indicated MIC (mg/L)a EFSA breakpoints (mg/L)b
0.06 0.12 0.25 0.5 1 2 4 8 16 32 64 128 256 512 1024 2048
Ampicillin 5 3 1 2
Vancomycin 9 4
Gentamicin 4 5 32
Kanamycin 1 2 4 2 1024
Streptomycin 1 3 5 128
Erythromycin 5 3 1 4
Tetracycline 9 4
Chloramphenicol 8 1 16
Linezolid 9 n.a.
Narasin 1 8 n.a.

aMICs determined by a VetMIC test. The antibiotic dilution ranges were: 0.25-32 mg/L (ampicillin), 1-128 mg/L (vancomycin), 2-256 mg/L (gentamicin), 16-2048 mg/L (kanamycin), 8-1024 mg/L (streptomycin), 0.5-64 mg/L (erythromycin, tetracycline and chloramphenicol), 0.25-16 mg/L (linezolid) and 0.12-16 (narasin). MICs which exceeded the upper or lower limit of the tested range are listed in the next dilution series. MICs higher than the EFSA breakpoints are indicated in bold.

bLAB with MICs higher than the EFSA breakpoints are considered as resistant strains [15]. n.a., not available.

Muñoz-Atienza et al.

Muñoz-Atienza et al. BMC Microbiology 2013 13:15   doi:10.1186/1471-2180-13-15

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