Abstract
A group S1 spiroplasmavirus, SV1/KC3·BC3, from spiroplasma strain KC3, was propagated on spiroplasma strain BC3 and purified by density gradients. Purified virus had a density of 1.21 g/cm3 in metrizamide and 1.39 g/cm3 in CsCl and contained DNA of undetermined size and conformation. The virus was stable to exposure to non-ionic detergents, pH's between 6 and 9, heating at 60°C, drying, and (partially) ether; but was sensitive to pH extremes, chloroform, and 100°C. One-step growth experiments showed, by plaque assay, virus release beginning at 60 min and continuing for at least 6 h with no decrease in host cell growth. Infection was thus nonlytic, but the occurrence of 2-mm turbid plaques on agar indicates either belated host cell death or decreased division rate. The virus differed in some of these respects from the morphologically similar group 1 acholeplasmaviruses.
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Liss, A., Cole, R.M. Spiroplasmavirus group 1: Isolation, growth, and properties. Current Microbiology 5, 357–362 (1981). https://doi.org/10.1007/BF01566749
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DOI: https://doi.org/10.1007/BF01566749