Fascioliasis

Fascioliasis is a zoonotic parasitic disease caused by Fasciola hepatica and Fasciola gigantica parasitizing the bile ducts of herbivorous mammals or humans. It is one of the severe parasitic diseases of cattle, sheep, and other animals, with an infection rate as high as 20%-60%, seriously endangering the development of animal husbandry. The selection of definitive hosts is not strict, and humans are not its suitable host, so ectopic parasitism is more common. The clinical manifestations are relatively complex and diverse, and relatively severe, mainly consisting of acute-phase manifestations caused by juvenile flukes in the abdominal cavity and liver, and chronic-phase manifestations dominated by bile duct inflammation and hyperplasia caused by adult flukes.