Complex sentence: After a short incubation period of a few hours to one day, the bacteria multiply in the intestinal lumen, causing an intestinal inflammation with diarrhea that is often mucopurulent (containing mucus or pus) and bloody.
Split into simpler sentences: After a short incubation period of a few hours to one day, the bacteria multiply in the intestinal lumen, causing an intestinal inflammation. Diarrhea is often mucopurulent (containing mucus or pus) and bloody.