Map of Egypt showing the sampling locations in the thee studied governorates of Nile Delta in Egypt. Kafrelsheikh governorate (Elhadadi , Bela, Sakha and Kafrmoger), Gharbia Governorate (Alhyatem, Kransho and, Fesha Sleem), and Menoufia Governorate (Tala-Babel, Berket Elsaba, Sheben Elkom, Menof-Tamalai, Elbagour-Kafr Shobra, and Ashmon -Sentres). White dots show sampling sites per each governorate.