 This is a double-blind, randomized control trial of the nutritional product PTM202, which is a food product based on cow milk colostrum and eggs from hens that have been immunized against human diarrheal pathogens. Children between the ages of 6 months and 3 years will be enrolled at two sites in Guatemala who present with acute diarrhea. The study will have two strata according to the severity of the diarrhea. 