Determination of the infection of Lymnaea-gedrosina to trematodes Larval in the water region of Khuzestan

The province of Khuzestan with its wide geographical area and its tropical climate is susceptible for the maintenance of snails. One of the prevalent intermediate hosts for trematode in this area is the gasteropode snail, Lymnaea gedrosina. This study is the first research, undertaken to determine the infection rate, biological characteristics and Longevity Lymnaea gedrosina. A total of 6213 snails (Lymnaea gedrosina) were examined, 770 snails were kept in identical natural condition in a set of several water bodies. Using two methods of cercarial shedding by light and crushing of snails were identified. Overall, 107 snails (5%) were infected with trematodes larval. The maximum and minimum infection rate Maravaneh 4, (44% - Ahvaz), Dezfull including Anjirak and Sidnoor (1.7% and 1% respectively). In addition, the maximum and minimum longevity time per Lymnaea gedrosina were respectively found to be in the spring and autumn. The results of this study could be utilized to plan control intermediate disease snails for the purpose of sanitation in the Khuzestan Province.