Fig. 6

Photomicrograph of skin tissue section of O. niloticus of PT + S group (A magnified in B (A, selected square)) showed normal epidermal cell thickening and organization, except more or less goblet (mucous) cells number (arrowheads), normal epidermal basement (zigzag arrows) and more or less positivity of PAS reaction of dermal connective tissue (stars). PAS stain. The bar size was indicated under pictures