rates of parasitism are currently reported in different areas of the country. An investigation with supposedly healthy patients of a health district of the municipality of Las Tunas detected the incidence of parasitism.Objective: to characterize clinical and epidemiological variables in patients with parasitism treated at the clinical laboratory of the "Manuel Fajardo Rivero" University Polyclinic of the municipality of Las Tunas, from January to December 2018.Methods: a descriptive

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... nal study was carried out with the aforementioned patients who were treated at the institution and during the period herein declared. The following variables were assessed: age group, three-month-period frequency, risk factors, parasitic species, clinical symptoms and medical treatment. The data were analyzed according to descriptive statistics.Results: the male sex prevailed (61,5 %). There was a higher frequency in the 6 to 19 age group (35,7 %), the April to June period (40,8 %), the intake of non-boiled potable water (45 %) and the parasitic species Blastocystis hominis (25,2 %). The clinical symptoms that were present in all the cases were diarrhea, nausea and abdominal pain. The medical treatment mostly ordered was secnidazole.Conclusions: the patients with parasitism were characterized, with a prevalence of the male sex, the intake of non-boiled potable water and a higher incidence in the trimester of year.