This retrospective study was conducted to establish the prevalence and epidemiological assessment of intestinal parasitosis in Al Hayat private laboratory for Medical Analysis of Ouezzane between 01/01/2015 and 31/03/2020. The careful analysis of 1607 EPS found that 345 were positive, an IPS of 21.47%. The thirteen intestinal parasites encountered, of which 53.33% produce protozooses and 46.67% produce helminthiases, ranked in descending order of frequency are: Entamoeba histolytica (26,96%), Ascaris lumbricoides (24,35%), Giardia intestinalis (15,94%), Ankylostoma sp. (15,07%), Entamoeba coli (8,99%), Trichostrongylus sp. (3,19%), Strongyloides stercoralis (2,32%), Endolimax nana (1,45%), Trichuris trichiura (0,58). Enterobius vermicularis, Taenia saginata, Fasciola hepatica and Schistosoma sp. are each represented by 0.29%. Parasitic infestation appears from the seventh month to the eighty-ninth year with a peak in the age group between 31 and 40 years (27.25%) followed by children under or equal to 10 years (26.09%). The average age of parasitic parasites is 30.37 years, while the sex ratio (M/F) is 0.94. Males are slightly more exposed to intestinal parasitism (21.79%) than females (21.16%). Parasites with oral transmission are dominant with 82.32% of which those related to fecal peril represent 81.74%. In contrast those with transcutaneous transmission are the least frequent (17.68%). Although several identified parasitic species are low pathogenic, their epidemiology requires the elaboration and development of programs to prevent and control all the diseases they cause.

Index Terms- Prevalence, intestinal parasitosis, Ouezzane