echinococcus granulosus. causes cystic echinococcosis

and animal biological biology brain breed causes cestode cyclophyllid cyst cystic dangerous disease dog echinococcosis echinococcus for granulosus health hydatid hyper illustration infection lethal liver medical microscope microscopic organ parasite platyhelminthes proglottids proliferation science scolex tapeworm tissue unhealthy use vector veterinary worm