Changes in Antibiotic Susceptibility of Helicobacter pylori in the Course of Eight Years in the Zaanstreek Region in The Netherlands

Table 2

Resistant and susceptible strains.

Number	Metronidazole	Clarithromycin
172	?	?
83	R	S
46	R	R
461	S	S
92	S	R

R: resistant; S: sensitive. Unknown means that resistance testing was not successful for this specific antibiotic.