Characterization of Resistance Against Live-attenuated Diarrhoeagenic E. Coli

"At study day 14, after a standardized evening meal and an overnight fast, subjects will receive a single oral dose of the attenuated diarrhoeagenic E. coli strain E1392-75-2A (dose will be either 1E10 CFU (n=22) or 5E10 CFU (n=22)). Oral challenge will occur at 10.00 AM. Under supervision of the project team, subjects will get a NaHCO3 solution (100 ml 2% NaHCO3) to neutralize the gastric acid. After 5 minutes, they get a fruit juice (100 ml) containing the attenuated diarrhoeagenic E. coli strain at the above-mentioned dose. Subjects go home, but are not allowed to drink or eat for 1 hour.~At study day 35, after a standardized evening meal and an overnight fast, all subjects will receive a second inoculation 1E10 CFU of the diarrhoeagenic E. coli."