Background: Gastrointestinal infection is one of the major causes of morbidity in children. Diarrhea is the common manifestation. Diarrheal prevention needs a balance mucosal immune system. Probiotic used in prevention of gastrointestinal infection needs to be considered. The aim of the study is to prove probiotic protection in ileal mucosa after lipopolysaccaride (LPS) Escherichia coli 055:B5 …