Summary
Virus particles with a buoyant density between 1.14 and 1.20 g/ml, with a peak density of 1.15 to 1.16 g/ml were shown to cause hog cholera disease in pigs. In electron microscopic studies particles of two distinct sizes were demonstrated in these fractions. A lipid enveloped particle with an outer diameter of 39–40 mμ and an inner (core) diameter of 28–29 mμ was proposed to be hog cholera virus.
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Mayr, A., Bachmann, P.A., Sheffy, B.E. et al. Electron optical and buoyant density studies of hog cholera virus. Archiv f Virusforschung 21, 113–119 (1967). https://doi.org/10.1007/BF01258482
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DOI: https://doi.org/10.1007/BF01258482