[Ultrastructural aspects of bovine papulous stomatitis virus replicated in cell cultures]

Ultramicroscopic structure of a strain (Mn-73) of BPSV grown on calf kidney primary cultures was investigated. Beside young and mature virions, virus particles with intermediate structural characteristics are described. Size of mature particles on electron microscopic photographs resulted of 270-280 X 140-150 nm, that is a little smaller in comparison with Nagington's et al. (1962) and Büttner's et al. (1964) estimations. Such discrepancy seems to arise from technical artifacts.