Pathogistology of parasitic nodules at spontaneous Setaria labiato-papillosa infection of bisons
The pathogistology of parasitic nodules induced by spontaneous S. labiato-papillosa (Alessandrini, 1838) infection at visceral serosa of mesentery in bisons (Bison bonasus) indicates on the development of local aseptic productive inflammatory process accompanied by immune reactions of host organism. The tissue base of pathological neoplasm in which Setaria is localized is connective stroma formed and structured by cell elements (fibroblasts, fibrocytes) and fibrous elements (collagen and elastic fibers). Stroma of parasitic nodules and more reactive zone of stroma - “foci” situate near parasite body which are intensively infiltrated by numerous small and median lymphocytes, plasmocytes being at different stages of transformation, hystocytes and macrophages. Single and associates labrocytes are localized in perivascular areas.