| environmental control of schistosomiasis through community participation in a moroccan oasis. | summary akka oasis, in the province of tata, southern morocco, is one of the oldest foci of urinary schistosomiasis in morocco where transmission is still taking place. we report the results of two studies: a cross-sectional snail survey investigated the distribution of bulinus truncatus in relation to habitat factors in the akka traditional irrigation system. the presence of aquatic vegetation, especially potamogeton sp. was identified as a key factor determining snail occurrence and abundance ... | 2004 | 15361113 |