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Electron micrographs showing the association of virus-containing tubules with the circular and longitudinal muscle fibers lining the midgut epithelium at 6 days padp. (Inset) Enlarged image of the boxed area. VP, viroplasm; bl, basal lamina; me, midgut epithelium; cm, circular muscle; lm, longitudinal muscle; arrows, virus-containing tubules. Bars, 100 nm.
