engleski

Fascioloidosis and fasciolosis in wild boar (Sus scrofa L.) on histological level

Fascioloidosis and fasciolosis are parasitic diseases of different species caused by non- native trematode Fascioloides magna and autochthonous liver fluke Fasciola hepatica. F. magna is parasitizing in the liver parenchyma within so called pseudocysts, while F. hepatica invades bile ducts. Wild boar liver samples were collected during regular hunting operations on the area of Sisačko-moslavačka County. Livers were analysed microscopically, sectioned at 2 cm thick layers and submitted for histological analysis (H&E, Van Gieson). Samples of faeces were analysed using standard coprological flotation and sedimentation techniques. Gross lesions included dark stained pigmented areas and pseudocysts (fascioloidosis), and dilated bile ducts filled with yellowish fluid and trematodes (fasciolosis). Flukes were identified using morphological keys. Coprological analysis confirmed presence of only F. hepatica eggs. Microscopic findings in the case of F. magna were characterized by migratory pathways filled with a mixture of necrotic debris, blood and iron-porphyrin pigment, while the main findings in the case of F. hepatica were proliferative and eosinophilic cholangitis. In one section an adult F. hepatica fluke was visible. Wild boar represents definitive host for F. magna characterized as dead-end host. The comparative histological analysis of livers infected with non-native and native parasite offers insight into host-parasite interactions and could make a contribution to understanding of wild boar reaction to infection with Fascioloides magna.

wild boar, Fascioloides magna, Fasciola hepatica, histological analysis

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