Egyptian Journal of Aquatic Biology & Fisheries Zoology Department, Faculty of Science, Ain Shams University, Cairo, Egypt. ISSN 1110 - 6131 Vol. 22(3): 71- 87 (2018) ejabf.journals.ekb.eg Potential role of rice cultivation and fish aquaculture in the transmission of schistosomiasis and the effect of pesticides and fertilizers used in rice cultivation on the snail Biomphalaria alexandrina and schistosome larval stages El- Khayat, H. M. M.1; Mahmoud, K. M. A. 1; Eissa, F. I 2; Mostafa, M. A.3 and Flefel, H. E.1 1- Department of Environmental Research and Medical Malacology, Theodor Bilharz Research Institute, Egypt. 2- Department of Environment and Bio-Agriculture, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt. 3- Department of Agriculture Zoology and Nematology, Faculty of Agriculture, Al-Azhar University, Cairo, Egypt. Corresponding author: Kadria M. A. Mahmoud;
[email protected] ARTICLE INFO ABSTRACT Article History: The present investigation aimed to study the potential role of rice Received: May12, 2018 cultivation and fish aquaculture in the transmission of schistosomiasis in Kafr Accepted:June 30, 2018 El-Sheikh governorate. This study accomplished in four non-governmental Available online:J uly 2018 rice fields; three non- governmental fish aquaculture and one governmental of _______________ each about one year. It was found that B. alexandrina established in all watercourses next to nongovernmental farms in the whole study, while B. Keywords: truncatus was observed in certain watercourses next to non-governmental Schistosomiasis farms. The toxicity of six pesticides (lampada, sylian, saturn, karasay, B. alexandrina mancozeb and machete and two fertilizers urea and mixed nitrate) which used B.