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The Journal of Basic and Applied Zoology
Fig. 3 | The Journal of Basic and Applied Zoology

Fig. 3

From: Screening of some weed extracts for ovicidal and larvicidal activities against dengue vector Aedes aegypti

Fig. 3

Cross-sections of A. aegypti larvae midgut depicting different stages of deterioration after weed extract treatment. A Normal midgut or control (stage 1 = −) with intact flattened cells, their dark nucleus, and clear cytoplasm. B Swelling of cells cytoplasm or vesicle formation (stage 2 = +). Arrow indicates swelling of cells. C Loss of cell-cell contact, damage of cell membrane, and distortion of cell and nucleus integrity (stage 3 = ++). Arrow indicates cell membrane/contact damage. D Complete damage of epithelium, disorganized cells, loss of cell-cell contact, and detachment of cells and basal lamina (stage 4 = +++). Note the cell and basil lamina detachment. Arrow indicates loss of cell integrity (L = intestinal lumen, IE = intestinal epithelium, BL = basal lamina; N = nucleus; DN = cell with damages nucleus)

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