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Fig. 3 | BMC Veterinary Research

Fig. 3

From: Molecular identification, phylogenetic analysis and histopathological study of pathogenic free-living amoebae isolated from discus fish (Symphysodon aequifasciatus) in Iran: 2020–2022

Fig. 3

Histopathological findings of gills. (a-b) Mild to severe infestation of secondary lamellae of gills with cysts of Acanthamoeba sp. (a) Lamellar epithelial hyperplasia (H) and interlamellar vesicles formation (V) and cysts (arrowheads). (b) Numerous cysts (arrowheads) of Acanthamoeba sp. and lamellar epithelial hyperplasia (H) are seen. (c-d) Higher magnifications show trophozoite (arrow) and cysts (arrowheads) of amoebae trapped inside the hyperplastic epithelial tissue. Interlamellar vesicles formation (V) are seen (H&E).

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