Aggregative Adherence Fimbriae I (AAF I) causes aggregation of the bacterial cells. These aggregate on small intestinal cells and cause mucous secretion which produces a biofilm. Enteroaggregative heat stabile toxin is an STa like toxin, and plasmid encoded toxin can also be present.
1 Umbilical hernia is a bulge around the belly button. It occurs when the muscle around the belly button does not close completely after birth.  Inguinal hernia is a bulge in the groin. It is more common in men.
An umbilical hernia appears as a painless lump in or near the navel (belly button). It may get bigger when laughing, coughing, crying or going to the toilet and may shrink when relaxing or lying down. In many cases, the umbilical hernia goes back in and the muscles reseal before the child's first birthday.