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Influence of different pH-values of gastric juice on viability of EHEC wild-type strain (ATCC 43894) and the luxS-deficient mutant strain in an in vitro GIT model. ATP activity was determined and used as basis for comparison of viability of the EHEC wild-type and the luxS deficient mutant. The fold changes were calculated on the basis of the value of the wild-type strain. Error bars indicate the standard deviations. Significance is indicated (∗p ≤ 0.05).
