“…Parasites cause loss of appetite, increased metabolism, intestinal malabsorption, and lesions in the intestinal mucosa that generate protein malnutrition and iron de ciency anemia (Aguilar et al, 2021).Among the parasites that can be transmitted by contaminated water with feces, are protozoa such as Entamoeba histolytica, Giardia intestinalis, Balantidium coli, Cryptosporidium spp, Cyclospora cayetanensis, Isospora belli, microsporidia, and helminths such as Ascaris spp, Trichuris spp, Trichuris spp, Trichuris spp, Ancylostoma spp, and Strongyloides spp. These infections can affect any individual regardless of age and are often followed by diarrhea, abdominal pain, and fever (Heredia Martínez, Tovar Meléndez, Gallego Jaramillo & Naranjo García, 2015).The study population of Villa Clarin (Colombia) was selected due to the availability of participation of the individuals analyzed (previous oral authorization of their parents), and the availability of information supply on the sanitary conditions of drinking water supply and basic public services (sewerage, electric service, natural gas supply, latrine supply). This event study was based the reports by Cardona-Arias (2014) on the unfavorable nutritional and sanitary conditions of the observed population and the consequent episodes of anemia.…”