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| Figure 3: Histopathological changes in Oreochromis niloticus collected from site I showed: a. Skin with slight accumulation of melanophores in the epidermal layer. b. Gills showing congestion in the lamellar and branchial blood vessels associated with hyperplasia at the base of secondary lamellae. c. Liver showing moderate vacuolar degeneration with mononuclear inflammatory cells infiltration and slight congestion. d. Liver showing widening of hepatic blood vessels and slight congestion. e. Ovary showing stromal edema, degenerated and necrotic follicles and oocytes with different stages of maturation. f. Testis showing degeneration and necrosis leading to decrease in the number of spermatogenic cells in the numerous siminiferous tubules, and vacuolar degeneration in the germinal epithelium. (H&E, X400). |
