RT Journal Article SR Electronic(1) A1 Clarke, J. K. A1 Attridge, J. T.YR 1968 T1 The Morphology of Simian Foamy Agents JF Journal of General Virology, VO 3 IS 2 SP 185 OP 190 DO https://doi.org/10.1099/0022-1317-3-2-185 PB Microbiology Society, SN 1465-2099, AB Summary Biological and serological properties of a simian agent (strain mk 5) were investigated and it was shown to be a type 1 foamy virus. Grids prepared from cells lysed with sodium phosphotungstate were satisfactory for demonstrating the virus and, using this technique, the standard virus particle was found to be 1100 Å in diameter. It was composed of an envelope with 125 Å projections with an internal component 725 Å in diameter. Variations in the morphology of the virus are described. The structure of foamy agents types 1 to 3 was indistinguishable from that of mk 5., UL https://www.microbiologyresearch.org/content/journal/jgv/10.1099/0022-1317-3-2-185