
Intestinal diseases are caused by parasites, due to the great increase of predominance and different forms of clinical manifestations, characterize a disorder of great relevance to public health. In the contagion of intestinal parasites, soil, air, water, flies, hands and food stand out as the main means of propagation of protozoa and helminths. This research had as objective the parasitological analysis of lettuces marketed in a free market. 60 fresh samples of lettuce specimens [Lactuca sativa] of curly variety were used for analysis purposes, using the spontaneous sedimentation technique. The most common enteroparasites found in lettuce samples were Ascarislumbricoides and Entamoeba coli. The effective action of the washing methods was then analyzed, meaning that the resting and washing with sodium hypochlorite obtained a better result in the removal of the parasites in relation to the other sanitizers. It is recommended the practice of educational actions aimed at the marketers and consumers, as well as uplifting through advertising media. It is necessary to offer better support of structure, in the points where the free fairs are held, above all in the sanitary situations and in the water supply.