Genetically modified enterotoxigenic Escherichia coli vaccines induce mucosal immune responses without inflammation.

ABSTRACT:

Objective

Enterotoxigenic Escherichia coli (ETEC) is a major cause of acute diarrhoea in children in the developing world, in travellers and in the military. Safe, effective vaccines could reduce morbidity and mortality. As immunity to ETEC is strain specific, the ability to create vaccines in vitro which express multiple antigens would be desirable. It was hypothesised that three genetically attenuated ETEC strains, one with a genetic addition, would be immunogenic and safe, and they were evaluated in the first licensed UK release of genetically modified oral vaccines.

Methods

Phase 1 studies of safety and immunogenicity were carried out at a Teaching Hospital in London. Varying oral doses of any of three oral vaccines, or placebo, were administered to volunteers of both se

SUBMITTER: Daley A 

PROVIDER: S-EPMC2095642 | biostudies-literature | 2007 Nov

REPOSITORIES: biostudies-literature