Fig. 4

Oocyst-like structures stained with different concentrations of mercurochrome at different magnifications. Protruding epithelial cell ×40, stained with 0.5% mercurochrome (A). Epithelial cells nuclei ×20, these cells have no black pigment and no defined membrane (B). Air bubble stained in 0.1% mercurochrome, at ×10 (C). Detached midgut cell at ×40, stained with 0.1% mercurochrome (D, E). Immature detached mosquito eggs on midgut. At ×40 magnification and 0.1% mercurochrome (F), at ×20 magnification and 1% mercurochrome (G), at ×20 magnification and 1% mercurochrome (H), and at ×40 magnification and 1% mercurochrome (I)