Table 2.

Clarithromycin susceptibility and resistance of 49H. pylori isolates as determined by the E-test and FISH using a mixture of the oligonucleotide probes ClaR1, ClaR2, and ClaR3 for hybridization

No. of strainsMIC(s) (μg/ml)Presence of resistance genotypeResult of testinga
260.016NegativeS
10.023NegativeS
40.032NegativeS
20.047NegativeS
10.064NegativeS
10.094NegativeS
10.125NegativeS
10.19NegativeS
132PositiveR
7>256PositiveR
40.016, >256Negative, positiveS, R
  • a Results of both the E-test and genotyping. Clarithromycin susceptibility (S) and resistance (R) are shown.