Food can be contaminated with these wastes, when irrigated with sewage and lack of hygiene during preparation and intake process. As can generalize that the transmission mechanism for these diseases is that of the three passes, “the year goes hand in hand to mouth and mouth passes into the intestine.

Organisms that can live as parasites in our intestines are very varied. The most common are: worms may clog the intestines and invade the respiratory tract and bile giardia, which adhere to the bowel wall and mechanical irritation caused by diarrhea and malabsorption of food, amoeba, which by producing toxins destroy the tissues of the gut and migrate to other organs like the liver, hookworms, which adhere to the intestinal wall and feed on blood, and finally, the cysticerci that pierce the intestinal mucous layer, reaching the vessel blood and spread to the muscles, brain, eye, liver, among others.