Distribution and ecology of Bulinus truncatus in Khuzestan, Iran.

摘要: The results of a 5-year study on the distribution and ecology Bulinus truncatus in Khuzestan, south-western Iran, are described. Live snails were found 4 foci, namely, main focus, upper Karun River, lower Karkheh Bala Rud watershed; addition, dead 3 other foci. patchy was related to presence surface waters their chemical composition.Monthly observations population dynamics role transmission Schistosoma haematobium S. bovis carried out 14 ponds, 9 canals, 5 swamps, 2 field drains, 1 spring stream-pool. In standing waters, peak snail could potentially occur seasons-May-July November-January-but seasons for mammalian schistosome cercariae April-May October-November. flowing higher number might be summer some canals winter another group canals. Canals more important sites human schistosomes than village ponds. Transmission took place mainly hot months when man-water contacts greatest. Village ponds accessible livestock bovine schistosomiasis. As new irrigation systems have been expanding this area attention should paid future schistosomiasis control programmes.