Abstract
Diarrhea is a disease responsible for a high mortality level all over the world, especially in developing countries. In 2003, it was responsible for 21% of children´s death and for the death of 1,5 million people. The major etiologic agents who cause this disease are ETEC (enterotoxigenic Escherichia coli), rotavirus, Vibrio cholera e Shigella ssp. Among these agents, the ETEC is very com…