TABLE 3.

Antimicrobial MIC ranges for P. aeruginosa ATCC 27853 at 24 and 48 h of incubation

Antimicrobial agent and incubation time (h)No. of occurrences at a MIC (μg/ml) ofa:% Of occurrences in rangeb
0.0020.0040.0080.0160.030.060.120.250.512481632641282565121,024
Gentamicin
    240000 5 181 50 4098.3
    480000 4 126 94 15 199.6
Chloramphenicol
    2400000012228NRc
    480000000240NR
Naladixic acid
    2400000001239NR
    4800000000240NR
Ciprofloxacin
    24000000 0 133 94 10 398.8
    480000000 44 176 16 498.3
Levofloxacin
    24000000 18 168 47 6 197.1
    48000000 15 102 112 9 299.2
Doxycycline
    240000003 45 106 83 3 097.5
    480000000 16 66 112 45 1 99.6
Tetracycline
    240000000 52 165 23 00100
    480000000 8 115 113 4 0100
Streptomycin
    240000000 43 155 40 2099.2
    480000000 24 111 87 16 299.2
Trimethoprim-sulfamethoxazole
    24000000031221807NR
    48000000003015753NR
  • a The absence of a value represents the limit of MIC dilutions tested. Recommended QC ranges represented in boldface characters.

  • b Percentages of results which fall within the recommended range (acceptable limit ≥95%).

  • c NR, no range recommended.