View clinical trials related to Escherichia Coli Infections.
Filter by:This is a trial to evaluate the safety and immunogenicity of double mutant heat-labile toxin LTR192G/L211A (dmLT) from Enterotoxigenic Escherichia coli (ETEC) by oral, sublingual, or intradermal vaccination in approximately 135 healthy adult volunteers, age 18-45 years. Study duration is approximately 2.5 years, with each participant duration for up to 9 months depending on the route of dmLT administered. There is no specific hypothesis being tested in this study. The primary objective of this study is to assess the reactogenicity, safety, and tolerability of dmLT when administered in three sequential doses, over a range of dosages by oral, sublingual, or intradermal routes.
Enteroaggregative E. coli (EAEC) is a bacterium that can cause diarrhea. The purposes of this study are to: determine how much EAEC is needed to cause diarrhea in a healthy person, determine if a genetic factor is important in causing diarrhea, and to see how the body's defenses control EAEC. Participants include 25 healthy adults, ages 18-40. Volunteers will be assigned to 1 of 4 dose levels in groups of 5 volunteers each. One volunteer in each group will receive a sodium bicarbonate placebo solution. Volunteers will be admitted to the University Clinical Research Unit for up to 8 days. Volunteers will receive therapy with levofloxacin to treat the infection either once they develop diarrhea or at Day 5 if they remain asymptomatic. Study procedures will include saliva, blood, and fecal sample collection. An optional study procedure will include an intestinal biopsy. Participants will be involved in study related procedures for up to 223 days.