Epidemiology of Schistosoma mansoni infection and associated risk factors among school children attending primary schools nearby rivers in Jimma town, an urban setting, Southwest Ethiopia

埃塞俄比亚西南部吉马镇（一个城市地区）河流附近小学学龄儿童曼氏血吸虫感染的流行病学及其相关危险因素