Journal of Nanotechnology / 2019 / Article / Tab 1 / Research Article
Antagonistic Effects of Sublethal Concentrations of Certain Mixtures of Metal Oxide Nanoparticles and the Bulk (Al2 O3 , CuO, and SiO2 ) on Gill Histology in Clarias gariepinus Table 1 Stages of change and histological alterations of the gill.
Alteration score Score description Histological alteration 0 Normal tissue No lesion or any alteration (NT) 2.0 Mild damage Mild thickening of gill lamella (GL1) Epithelial hyperplasia (EH) Hypertrophy (HPT) 4.0 Moderate damage Moderate thickening of gill lamella (GL2) Oedema (OD) 6.0 Partially severe damage Eroded outer operculum (ERO) Epithelial lifting (EPL) Partial fusion of secondary lamella (FSGL1) Erosion of gill lamella (EGL) Shortening of secondary lamella (SSGL) Stunted gill lamella (SGL) Blunt secondary lamella (BSGL) Uncontrolled proliferation of epithelial cells (PEC) 8.0 Severe damage Severe thickening of gill lamella (GL3) Complete fusion of secondary lamella (FSGL1) Aneurysm (ANS) 10.0 Irreparable damage Necrosis (N) Total damage to the lamella (TDL)