[Evolution of the prevalence of intestinal parasitosis in the region of Tunis from 1996 at 2012]

Background: The prevalence of intestinal parasitosis is very different according to countries. Therefore, it is always interesting to update the data in Tunisia to better direct control measures

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Aim: The objectives of this survey were to estimate the prevalence of intestinal parasitosis in the region of Tunis, to study their evolution and to establish various combinations of intestinal protozoa

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Methods: This is a retrospective study carried out over a period of 17 years from 1996 at 2012 and which involved 20033 individuals. Each subject had one or more stool examination which included a direct microscopic examination and a concentration by modified Ritchie technique

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Results: The prevalence of intestinal parasitosis was 12.55%. Entamoeba histolytica/dispar and Giardia intestinalis accounted respectively a prevalence of 0.51% and 1.48%. Hymenolepis nana was the most predominant helminth with a prevalence rate of 0.53%, followed by Enterobius vermicularis [0.21%]. Two cases of Hookworms and seven cases of Strongyloides stercoralis were diagnosed. Polyparasitism concerned 16.59% of infected individuals. Significant combinations occured mainly for amoeba in particular Entamoeba histolytica/dispar and Entamoeba coli [r=0.232]

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Conclusion: Our study confirms the decrease of the prevalence of giardiasis and amebiasis, whereas helminthiases with direct transmission remain frequent