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.

Many of those infected by parasites have no complaints. Even in some cases the symptoms are so mild that near-misses, but this does not mean it is not parasites and can spread to others.

Exist to reach the symptoms that occur most frequently are:
• Diarrhea or constipation.
• Stomach pain (colic or cramps).
• Inflammation of the stomach.
• Headache.
• Gases.
• Nausea.
• Belching.
• Vomiting.
• Itching in the anus.
• Intolerance to certain foods.
• General weakness.
• Loss of appetite.
• In small, worms and parasites can cause slow growth and poor weight gain.
• Lack of attention at work, depression and fatigue.

Wash and disinfect fruits and vegetables, especially the latter, since they can harbor many parasites, especially not been in contact with sewage.

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