Figure 2. H pylori burdens are significantly reduced in [13C]urea breath test (UBT)-negative volunteers. Biopsies obtained 6 weeks (second gastroscopy; 2nd) and 3 months (third gastroscopy; 3rd) after infection from the antrum and corpus were processed to determine H pylori colony-forming units (cfu). Data are represented by box and whisker plots which indicate median, range and 25th–75th centiles of the log10 transform of cfu counted per biopsy of the UBT− (shaded box) and UBT+ (open box) group of volunteers. Differences in colonisation were highly significant (p<0.0001 in all cases; two sided Mann–Whitney test).
