Variability in Prevalence of Helicobacter pylori Strains Resistant to Clarithromycin and Levofloxacin in Southern Poland

Table 1

Comparison of resistance of H. pylori primary and secondary strains to clarithromycin and levofloxacin in 2009–2011.

Antimicrobial agent	No. (%) of resistant H. pylori strains in the
	years 2009–2011
	All strains	Primary strains	Secondary strains
	𝑛=51	𝑛=43	𝑛=8
CLA^(1)	11 (22%)	8 (19%)	3 (38%)
LEV^(1)	8 (16%)	5 (12%)	3 (38%)

⁽¹⁾CLA: clarithromycin, LEV: levofloxacin.