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. 2012 May;56(5):2780–2783. doi: 10.1128/AAC.06342-11

Table 1.

MIC Summary for 257 clinical isolates of Ureaplasma species

Drug MIC range (μg/ml) MIC50 (μg/ml) MIC90 (μg/ml) No. of resistant isolates (% resistance)a
Levofloxacin 0.125-32 0.5 2 13 (5)
Erythromycin 0.125-128 1 2 3 (1)
Tetracycline 0.016-128 0.5 32 87 (34)
a

Resistance was defined using breakpoints published by the CLSI for Ureaplasma urealyticum (4). These breakpoints were ≥4 μg/ml for levofloxacin, ≥16 μg/ml for erythromycin, and ≥2 μg/ml for tetracycline.