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Table 1 MIC range and MIC50 and MIC90 values of nine antimicrobial agents

From: In vitro antimicrobial susceptibility testing of human Brucella melitensis isolates from Ulanqab of Inner Mongolia, China

Antibiotic

Range (μg/mL)

MIC50 (μg/mL)

MIC90 (μg/mL)

(S)

(I)

(R)

Breakpoint for Susceptibility (μg/mL)

Minocycline

0.032

0.032

0.032

85

–

–

≤0.5a

Sparfloxacin

0.032

0.032

0.032

85

–

–

≤0.5a

Doxycycline

0.032–0.25

0.125

0.25

85

–

–

≤1

Tetracycline

0.064–1.0

0.25

0.5

85

–

–

≤1

Ciprofloxacin

0.125–1.0

0.5

0.5

85

–

–

≤1a

Levofloxacin

0.125–1.0

0.5

0.5

85

–

–

≤1

Gentamicin

0.25–1.0

0.5

1.0

85

–

–

≤4a

Rifampin

0.5–2.0

0.5

1.0

59

25

1

≤2a

Cotrimoxazole

0.032–2.0

0.5

1.0

79

–

6

≤2/38

  1. aCLSI breakpoints for slow-growing bacteria (Haemophilus spp.)