Transmission electron micrographs showing RSV inclusion bodies and endogenous microorganisms in SBPH. A: Light micrographs showing the transverse section of ovum with methylene blue staining. B: The magnified yeast-like endosymbiotes (YLES). C: The cytoplasmic matrix of follicular cells in the exuberant secretion phase. D: The follicular cells without inclusions in non-viruliferous SBPH. E-J, M, N: The amorphous RSV inclusion bodies in follicular cells of viruliferous SBPH. RSV inclusions were indicated by arrows. Panel G is an enlargement of the boxed area of panel E; Panel M is an enlargement of the boxed area of panel H to show parallel filamentary structures inside the inclusions; Panel N is an enlargement of the boxed area of panel J to show sand-like structures inside the inclusions. K, L: The RSV inclusions in rice cells. Panel K and L is cited from Hong et al.. O, R: The crystal-like spherical virions in midgut cells of SBPH. Panel R is an enlargement of the boxed area of panel O. P, Q: Various endosymbiotic bacteria in the insect midgut. Scale bars: 50 μm (A), 1 μm (C, E, K, L), 0.5 μm (B, D, O, P), 0.2 μm (F, G, H, I, J, Q, R) and 0.1 μm (M, N).