Table 3.

Amoxicillin resistance rate and susceptibility to clarithromycin and metronidazole

Resistance% amoxicillin resistance (no. of resistant strains/no. tested)aMIC
50%90%
CLR susceptible, MNZ susceptible13.6 (6/45)<0.0150.06
CLR resistant, MNZ susceptible32.2 (66/205) +0.030.12
CLR susceptible, MNZ resistant45.5 (5/11) +0.030.5
CLR resistant, MNZ resistant48.8 (40/82) # +++0.030.25
  • a Amoxicillin resistance: MIC ≥ 0.06 μg/ml. +, P < 0.05 versus results for CLR-susceptible, MNZ-susceptible group; +++, P < 0.001 versus results for CLR-susceptible, MNZ-susceptible group; #, P < 0.05 versus results for CLR-resistant, MNZ-susceptible group.