I have done my sampling for feacal sample on cattle to see whether it has been infected by the liver fluke or not. And the result surprisingly shows that almost all the samples were positive to fascioliasis. But I found out there are many Melanoides tuberculata but no Lymnaea in the grazing area. I understand that M. tuberculata is the intermediate host for fish trematodes. Is there any relationship or interaction between M. tuberculata and fascioliasis?