Histopathological changes spleen, k

Histopathological
changes
spleen,
kidney
muscular tissue of O. niloticus from illegal fish farm may be due to pathogens and metals pollutions as recorded by Tayel et al. (2007). Necrosis, hemolysis, dilation in blood vessels, degeneration, hemorrhage, fibrosis, reduction in red pulp and increase of white pulp were the main histopathological changes in spleen of O. niloticus captured from a polluted drainage canal in Al-Minufiya Province, Egypt, observed by Tayel et al. (2007). Owing the fact that activation of melanomacrophage centers (MMCs) in the spleenic parenchyma was correlated directly to pollution where the MMCs recorded as bioindicators for pollution. These findings were in agreement with Agius and Roberts (2003) who mentioned that melanomacrophages were increased in size or frequency in condition of environmental stress and have been suggested as reliable biomarkers for water quality.