f08/1136 rainbow trout, fish farm macroscopy: multiple white nodules … · 2013. 10. 7. ·...
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F08/1136
Rainbow trout, fish farm
Macroscopy: multiple white nodules on the skin, sometimes
ulcerated
Organ: skin
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Epidermis Necrosis
Dermis
Musculature
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Bacterial colonies
Neutrophilic granulocytes, partly
degenerated
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Oedema of scale pockets
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Furunculosis
Morphological diagnosis
Skin, necrotising and purulent dermatitis, focal extensive, severe, acute
with bacterial colonies
Aetiology
Aeromonas salmonicida subsp. salmonicida
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F09/852
Rainbow trout, fish farm
Clinic: low mortality rates
Macroscopy: miliary whitish nodules in liver, kidney and heart, splenomegaly
Organs: kidney, heart
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Histologische Befunde
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Histologische Befunde Subendocardial, subepicardial and
myocardial infiltration with mainly
macrophages
Myocardial degeneration
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Histologische Befunde
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Histologische Befunde
Leber
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Gram-staining Immunohistochemistry
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Aetiology
Renibacterium salmoninarum
Morphological diagnoses
Heart, granulomatous epi-, endo- and myocarditis, multifocal, moderate
with intracytoplasmatic bacteria
Kidney, granulomatous nephritis, multifocal, moderate with
intracytoplasmatic bacteria
Bacterial Kidney Disease (BKD)
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F07/4108 and F05/4000
Rainbow trout, fish farm
Clinic: increased respiration rate, high mortality
Organ: gills
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Epithelial hyperplasia
Lamellar fusion
Formation of pseudocysts
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Epithelial necrosis
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Morphological diagnosis
Gills, proliferative branchitis, multifocal, severe, with filamentous
bacteria (and ciliates)
Aetiologies
Flavobacterium branchiophilum
(Trichodina sp.)
Bacterial gill disease
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Rainbow trout fry, fish farm
Clinic: high mortality in fry
Organ: spleen
F09/1378 and F13/6261
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Spleen
Fat tissue
Pancreas
F09/1378
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Granulomatous inflammation
Blurred border line
Fibrin
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Morphological diagnoses
Spleen, granulomatous splenitis, multifocal to coalescing, severe
Pancreas, fat tissue, granulomatous steatitis and pancreatitis, multifocal
to coalescing, moderate
Rainbow trout fry syndrome
Flavobacterium psychrophilum
Aetiology
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F13/6261
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Morphological diagnoses
Spleen, necrotising and haemorrhagic splenitis, diffuse, severe
Rainbow trout fry syndrome
Flavobacterium psychrophilum
Aetiology
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F06/491
Ornamental fish, freshwater aquaria
Clinic: chronic course, low mortality, apathy, cachexia, deformed
spine
Organ: cross section through several organs
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Kidney and spleen
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Necrosis
Macrophages
Fibrocytes
Kidney
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Gill hyperplasia, moderate with fusion of secondary lamellae and interlamellar bacterial colonies Gill hyperplasia, moderate with fusion of secondary lamellae and interlamellar bacterial colonies
Morphological diagnosis
Liver, kidney, spleen, intestine, peritoneum, eye, granulomatous
hepatitis, ...., multifocal, severe
Aetiology
Mycobacterium sp.
Fish Tuberculosis
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Microsporidien im ovar
R03/1226
Feral brown trout
No clinical symptoms
Organ: ovary
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Egg shell
Microspora
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Eccentric nucleus
Vacuole
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Macrophages
Lymphocytes
Multinucleated giant cells
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Morphological diagnosis
Ovary, granulomatous oophoritis, multifocal, severe with intracellular
microsporidia
Aetiology
Microspora salmonis
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R01/751
Rainbow trout, fish farm, natural environment
Organ: kidney
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Granulomatous inflammation
Ichthyophonus spore
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Epitheloid-macrophages
Multinucleated giant cells
Basophilic lamellar cell
membrane
Granulated cytoplasm
Multiple small basophilic
nuclei
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Degenerated spore
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Pseudohyphi
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Hyaline degeneration
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Morphological diagnosis
Kidney, granulomatous nephritis, multifocal, severe with Ichthyophonus
spores
Aetiology
Ichthyophonus hoferi
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