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Table 1 Antibiotic resistances

From: High levels of multiresistance in quinolone resistant urinary tract isolates of Escherichia coli from Norway; a non clonal phenomen?

  Cipro0.032(n = 43) Cipro0.5(n = 75) Cipro64(n = 75)
Antibiotic S I R S I R S I R
Ampicillin - 37 6 - 22 53 - 16 59
Mecillinam 41 - 2 62 - 13 60 - 15
Kanamycin 42 - 1 66 - 9 61 - 14
Chloramphenicol 41 - 2 50 - 25 45 - 30
Tetracycline 38 - 5 27 1 47 19 3 53
Nitrofurantoin 43 - - 74 - 1 74 - 1
Sulphonamide 34 3 6 22 1 52 13 0 62
Trimethoprim 38 - 5 32 1 42 20 - 55
  1. Cutoff values between sensitive, intermediate and resistant were: Ampicillin: I >0.5, R >8; Mecillinam: R >8; Chloramphenicol: R >8; Nitrofurantoin: R >64; Trimethoprim: I >2, R >4[25]. Tetracycline: I >4, R >8; Sulphonamide: I >64, R >128[26]. Kanamycin: R >10.