1887

Abstract

Summary

The morphogenesis of a type 1 foamy agent (strain 5) propagated in HEp2 cells was examined using ultrathin sections. The virus consisted of a nucleoid (350 Å) surrounded by two shells 600 Å and 900 Å in diameter. The inner shell and the nucleoid (together making a spherical internal component) appeared in the cytoplasm and by budding became enveloped by a morphologically altered cell membrane which bore projections. The staining properties of the virus depended on the method of fixation. Inclusions seen in infected cells are described. Strain 5 was indistinguishable morphologically from a strain of type 2 foamy virus.

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1969-03-01
2022-01-20
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