Journal of Environment and Earth Science www.iiste.org ISSN 2224-3216 (Paper) ISSN 2225-0948 (Online) Vol.5, No.1, 2015 174 Trematode infection among freshwater gastropods in the Gharb area, Morocco Hicham Barkia (Corresponding author), Faculty of Sciences, Laboratory of Biology & Health, University Ibn Tofail, BP. 133, Kenitra; E-Mails: h_barkia@yahoo.fr Abdelaziz Barkia Directorate of Epidemiology and Fight against Diseases (DELM), Ministry of Health, 71 Avenue Ibn Sina, Agdal - Rabat, Morocco; E-Mail: azizbarkia@yahoo.fr Rajae Yacoubi Faculty of Sciences, University Ibn Tofail, BP. 133, Kenitra ; E-Mail: yacoubi79@yahoo.fr Youssef EL Guemri Regional Centre for Careers Education and Training Marrakech elguamri3000@yahoo.fr Youssef El Madhi Regional Centre for Careers Education and Training Rabat Annex Khémisset yousmad@yahoo.fr, Driss Belghyti Faculty of Sciences, Laboratory of Biology & Health, University Ibn Tofail, BP. 133, Kenitra belghyti@hotmail.com Abstract In the summer of 2012 and the spring of 2013, a snail survey aimed at determining relationships between the distribution of molluscan fauna, various environmental factors and trematode infection was carried out in the Gharb area, Morocco. The molluscan fauna consisted of eleven species belonging to 6 families, (including 9 gastropods and 2 bivalves). Cercariae belonging to five families were collected. Only Melanopsis praemorsa, Lymnea peregra and Lymnaea truncatula issued the cercariae. No case of mixed -species infections was found. The present study, first of its kind at the Gharb region, paved the way for other studies to know information about the distribution and ecology of freshwater molluscs in the region. Index Keywords : Cercariae, freshwater gastropods, Trematode infection, The Garb area, Morocco.