苏旦吉齐拉灌溉总面积共80万公顷,区内约有150万阿拉伯人,他们的曼氏血吸虫感染率为50%,埃及血吸虫感染率则各村不一。在阿拉伯人居住村庄的外围,散居着西苏丹和尼日利亚移来的劳力和他们的家属,摘棉花季节还有临时来的雇工,总共也有近百万人,他们的曼氏血吸虫感染率也在50% Suddanjiraila has a total area of ​​800,000 hectares of irrigated land, about 1.5 million Arabs in the area, 50% of them are infected with Schistosoma mansoni, and different rates of infection by schistosomiasis in different villages. In the periphery of the Arab-enclaved villages, laborers and their families migrated from West Sudan and Nigeria were scattered along with temporary workers during the cotton picking season, with a total of nearly 1 million people and their infection rate of Schistosoma mansoni at 50 %