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In vitro studies using LL-EI immunized mice sera showed substantial protection against bacterial adhesion and invasion caused by E. coli O157 and Shigella flexneri¸ respectively. LL-EI immunized group challenged with E. coli O157 ceased fecal shedding within 6 days, and mice challenged with S. flexneri showed 93% survival with minimal bacterial load in the lungs. Our results indicate that LL-EI immunization elicits systemic, mucosal and cell-mediated immune responses, and can be a promising candidate for oral vaccine development against th