برسي اثرات هيستوپاتولوژيك ديپلوستوميازيس (Diplostomum spathaceum Rudolphi, 1819) بر روي گونه ماهي فيتوفاگ، (Valenciennes 1844) Hypophtalmichthys molitrix

Pathologic effects of Diplostomum spathaceum (Rudolphi, 1819) on Hypophthalmichthys molitrix(Valenciennesi844) eye .

Pathologically most lesions are characterized by penetration of metacercariae, subcapsular vacuolation and degeneration of lens fibers, liquefaction of fibers which gives them a basophilic appearance, and the acute parasitic cataract causes rupture of lens capsule and deposition of lens parts in vitreous body. In cornea pathologic lesions are characterized by keratitis by hydropic degeneration, infiltration of granulocytes containing orange granules with epithelial sloughing of epithelial cells. It is supposed that sloughing is due to host defense against parasite penetration. No characteristic lesion was observed in other parts of the eye. In a phytophage case, however, due to a heavy parasitic infection, lens in the left eye was completely destroyed such that only the compact nucleolus was remained and a constant miosis could be observed.