Life Cycle of Liver Worms (Fasciola hepatica)

Life Cycle of Liver Worms (Fasciola hepatica) ➤  In the main host body of livestock, fish, humans Adult worms live in the liver lay eggs in the intestine → follow feces → open defecation in the environment → eggs with feces wasted into the water. ➤  The eggs hatch so that the larvae with cilia (vibrating hair) throughout the body surface form the Mirasidium larvae which then swim in search of the Lymnea snail Mirididium will die if it does not enter the body of the freshwater snail (Lymnea truncatula) ➤  Mirasidium after being in the snail turns into Sporosis (settles in the body of the snail for 2 weeks). ➤ Larvae larvae have reproductive ability asexually by means of Paedogenesis in the body of the snail so that many larvae are formed, vLarvae Sporosis performs Paedogenesis into several Redia vLarva Redia does Paedogenesis to Cercariae vSercaria Larvae then tail to become Metacercaria and immediately come out of the snail to swim looking for plants that are on the edge of the waters such as grass. ➤ The Metacercaria encapsulates itself in the form of a cyst that can last a long time against grass or surrounding water plants. ➤ If the grass is eaten by sheep, the cyst can penetrate the intestinal wall, then enter the liver, bile duct and adult there for several months. Adult worms lay eggs again and this cycle repeats itself. Fig. Life cycle of Fasciola hepatica