225 Intravenous Esomeprazole for Prevention of Peptic Ulcer Re-Bleeding in a Predominantly Caucasian Population: Results On Clinical Benefits and Hospital Resource Use

and quantified CagA translocation by Western blot using anti-phosphotyrosine and antiCagA antibodies. Significantly higher levels of CagA were translocated by the 7.13 0310mutant compared to wild-type H. pylori strain 7.13. By utilizing proteomics technology to contrast two closely related H. pylori strains that induce distinct phenotypes, we have shown that HP0310 may function to alter levels of peptidoglycan, thereby affecting the composition of substrates translocated by the cag secretion system. These studies also provide an important foundation for investigating the role of bacterial virulence factors in H. pylori-induced pathologic sequelae, as such results would ultimately allow for generation of a profile of H. pylori proteins to use for screening persons infected with strains most likely to induce severe disease.