Figure 4. a. Sections of the kidney from the control fish showing apparently normal tubular and hematopoietic compartment. The tubular is a closely packed tubule with glomeruli.

b. Section of kidney from effluent treated fish showing severe depletion of the tubular (T) and hematopoietic (H) compartments thus appearing more prominent. Mag. x400

c. Section from the effluent treated fish showing tubules that are widely separated from each other with decrease in the tubular (T) compartment and accompanying increase in the hematopoietic (H) compartment; there are multiple foci of degenerated tubules (D). Mag. x400