Fig. 4

Distribution of Schistosoma spp. cercariae shed from Bulinus spp. collected in Niamey region, Niger River Valley. Circle size is proportional to the number of infected Bulinus spp. per village
Distribution of Schistosoma spp. cercariae shed from Bulinus spp. collected in Niamey region, Niger River Valley. Circle size is proportional to the number of infected Bulinus spp. per village