A NONOCCLUDED REOVIRUS OF THE OLIVE FLY, DACUS-OLEAE

We have isolated paraspherical viral particles, 60 nm in diameter, fro m adults of the olive fly (Dacus oleae) collected in Greece, The virus actively replicated in midgut epithelial cells and in advanced infect ions virions accumulated in microvilli, They were released in the gut lumen and were very abundant in fly faeces, The virions exhibited the salient features of reoviruses, with an external shell and an internal core with a tubular subunit protruding at each vertex of the icosahed ron, The viral genome consisted of ten segments of double-stranded RNA totalling 23.4 kbp, Based on its overall properties, this virus can b e considered as a nonoccluded insect reovirus.