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Pathology of Edwardsiella tarda infection in turbot, Scophthalmus maximus (L.)
Author(s) -
Padrós F,
Zarza C,
Dopazo L,
Cuadrado M,
Crespo S
Publication year - 2006
Publication title -
journal of fish diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 85
eISSN - 1365-2761
pISSN - 0140-7775
DOI - 10.1111/j.1365-2761.2006.00685.x
Subject(s) - turbot , scophthalmus , edwardsiella tarda , biology , spleen , pathology , phagocyte , microbiology and biotechnology , inflammation , necrosis , kidney , bacteria , ultrastructure , sepsis , phagocytosis , immunology , anatomy , fish <actinopterygii> , medicine , endocrinology , genetics , fishery
Macroscopic and histopathological changes in cultured turbot, Scophthalmus maximus (L.), in Spain caused by infection with Edwardsiella tarda are described. Eye tumefaction, inflammation, haemorrhages, ascites and the presence of a purulent fluid were the main macroscopic lesions observed. Histopathological lesions were found in the kidney, spleen and liver. In the kidney and spleen these were characterized by a severe apostematous inflammatory reaction, with a large number of abscesses. The liver was affected to a lesser degree and only some phagocytes loaded with bacteria were observed. Ultrastructural observations indicated that macrophages were the main cell type implicated in the inflammatory response. Most of the bacteria observed within the phagocyte cytoplasm showed no degenerative changes and some were dividing. Degenerative changes observed in macrophages indicate their failure in preventing the infection.