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Immune complex-mediated glomerulopathy in Barbus graellsi infected with Myxobolus spp
M A Peribañez1, E del Cacho, J A Castillo
1Department of Animal Pathology, Faculty of Veterinary, University of Zaragoza, Spain.
Abstract:
Membranous glomerulonephritis caused in Barbus graellsi by myxosporidian infections have been studied by electron microscopy and immunoelectron microscopy techniques. This study indicates that Myxosporidian infection produces a chronic severe aggression. Spores reach the spleen, the kidney and the liver, where they are trapped and phagocyted by Melano Macrophage Centres. Consequently, the commencement of a immunological response to myxosporidian is evident. Our results show the presence of immunodeposits in the basement membrane of the glomeruli, suggesting that they might initiate glomerulonephritis. The lesion was markedly similar to immune complex-mediated glomerulonephritis disease in higher vertebrates.
Insights
Myxosporidian infections in Barbus graellsi fish cause severe kidney damage, leading to membranous glomerulonephritis. Immune deposits in the glomeruli suggest an autoimmune response triggered by the parasite.
Area of Science:
- Ichthyopathology
- Fish immunology
- Parasitology
Background:
- Myxosporidian parasites are known pathogens affecting various fish species.
- Glomerulonephritis, a kidney disease, can impact fish health and aquaculture.
- The immune response of fish to parasitic infections requires further elucidation.
Purpose of the Study:
- To investigate the pathological effects of Myxosporidian infections on Barbus graellsi kidneys.
- To identify the immunological mechanisms underlying Myxosporidian-induced glomerulonephritis in fish.
- To characterize the ultrastructural changes associated with this condition.
Main Methods:
- Electron microscopy (EM) was employed to examine kidney tissue ultrastructure.
- Immunoelectron microscopy (IEM) was utilized to detect immune deposits.
- Histopathological analysis of spleen, kidney, and liver tissues was performed.
Main Results:
- Myxosporidian spores were observed in the spleen, kidney, and liver, phagocytosed by Melano Macrophage Centres.
- Evidence of an immunological response to the parasite was detected.
- Immunodeposits were identified in the glomerular basement membrane, indicating immune complex formation.
Conclusions:
- Myxosporidian infection induces chronic, severe kidney damage in Barbus graellsi.
- The observed membranous glomerulonephritis is likely immune complex-mediated, similar to higher vertebrates.
- This study highlights a significant pathological consequence of myxosporidian parasitism in fish.
