Minimal Inhibitory Concentration (MIC₅₀, MIC₉₀ and range) values of <i>Brucella abortus</i> strains isolated from cattle in Brazil, 1977–2009, to eight antimicrobials used in the treatment of human brucellosis.

aVariation of MIC values (number of dilution variations) for every antimicrobial bMinimum Inhibitory Concentration required to inhibit the growth of 50% of the strains cMinimum Inhibitory Concentration required to inhibit the growth of 90% of the strains dNumber of sensitive strains in the MIC established eBreakpoint of resistance for Brucella spp. strains (μg/mL) fNumber of resistant strains gPercentage of resistant strains hThe breakpoints for rifampin are: resistance ≥ 4.0 μg/mL, intermediate 2.0 μg/mL and sensitivity ≤ 1.0 μg/mL. Minimal Inhibitory Concentration (MIC50, MIC90 and range) values of Brucella abortus strains isolated from cattle in Brazil, 1977–2009, to eight antimicrobials used in the treatment of human brucellosis.