From: Mutations in the 23S rRNA gene are associated with clarithromycin resistance in Helicobacter pylori isolates in Brazil
Mutation
No. of strains (%)
Total (%) (n = 52)
MIC < 64 μg ml -1
MIC ≥64 μg ml -1
A2142G
12 (63.2)
31 (91.1)
43 (82.7)
A2143G
5 (26.3)
1 (4.45)
6 (11.5)
T2245C
2 (10.5)
3 (5.8)