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. 2016 Sep 23;4(11):1026–1033. doi: 10.1002/ccr3.687

Figure 4.

Figure 4

Anti‐Helicobacter IgG response in two human subjects re‐infected with H. pylori. Serum samples were collected from each subject at the indicated visits. Anti‐H. pylori and anti‐H. pylori urease IgG antibodies were measured by standard ELISA. Anti‐H. pylori IgG and anti‐H. pylori urease IgG titers at different time points in the study for subject 1 and subject 2. Results are expressed as the optical density (OD) at 405 nm from sera diluted at 1:20. The anti‐H. pylori IgG response was stable across the study and did not decline after the eradication of H. pylori. The anti‐urease IgG response reflects this observation. H. pylori antibodies persist during chronic infection.