TABLE 1.

Sources of isolates and MICs of various antibioticsa

IsolateSourceMIC (μg/ml)
PBRIFDoxyFEPIMICZCROGMTGCL
1Sputum32>3283216≥64≥64≥1628
2Tracheal aspirate323286416≥64≥64≥1628
3Tracheal aspirate1283246416≥64≥64≥1628
4Sputum3232412816≥64≥64≥1626
5Axilla643246432≥64≥64≥1628
6Tracheal aspirate323243216≥6432≥1628
7Urine64>328>12864≥64≥64≥1684
16Tracheal aspirate163243232≥64≥64≥16212
17Urine32>3286432≥64≥64828
29Urine323283232≥64≥64≥16212
32Sputum64>3283232≥64≥648812
35Catheter tip128>32163232≥64≥648412
  • a The isolates were tested against polymyxin B (PB), rifampin (RIF), doxycycline (Doxy; susceptible MIC [S] ≤ 4 μg/ml, intermediate MIC [I] = 8 μg/ml, resistant MIC [R] ≥ 16 μg/ml), cefepime (FEP; S ≤ 8 μg/ml, I = 16 μg/ml, R ≥ 32 μg/ml), imipenem (IMI; S ≤ 4 μg/ml, I = 8 μg/ml, R ≥ 16 μg/ml), cefazolin (CZ; S ≤ 8 μg/ml, I = 16 μg/ml, R ≥ 32 μg/ml), ceftriaxone (CRO; S ≤ 8 μg/ml, I = 16 to 32 μg/ml, R ≥ 64 μg/ml), gentamicin (GM; S ≤ 4 μg/ml, I = 8 μg/ml, R ≥ 16 μg/ml), tigecycline (TG; S ≤ 4 μg/ml, I = 8 μg/ml, R ≥ 16 μg/ml), and colistin (CL).