436727.fig.002
Figure 2: Results of PCR study showed the amplification products of Helicobacter-specific virulence factors cagA (324 bp), vacA s1 (259 bp), vacA s2 (286 bp), vacA m1 (290 bp), and vacA m2 (352 bp) such as patient 1 with CSU and positive genotypes cagA and vacA s1m1 and patient 2 (control group) with positive expression of cagA and vacA s1m2 but without CSU.