[An outbreak of Streptococcus zooepidemicus-caused infection among laboratory primates]. / Vspyshka infektsii, vyzvannoi Streptococcus zooepidemicus, sredi laboratornykh primatov.

An outbreak of septicemia caused by S. zooepidemicus in representatives of 5 species of lower monkeys, viz. Macaca mulatta (5), Macaca nemestrina (1), Macaca fascicularis (2), Cercopithecus aethiops (2), Mandrillus sphinx (1), is described. The disease was accompanied by the symptoms of enteric infection and well responded to etiotropic therapy with antibiotics of the penicillin row. The source of this infection was not established. Until now it is one of few descriptions of enteric infection in lower monkeys caused by S.zooepidemicus.

[Morphology of the surface of normal and virus transformed cells in vitro]. / Morfologiia poverkhnosti normal'nykh i transformirovannykh virusom kletok in vitro.

The cell surface morphology of two cell lines--from the mink lung (Mv1Lu) and from the Kirsten sarcoma virus transformed derivate (Ki-Mv1Lu)--was studied by scanning electron microscopy. Marked differences are seen in cell morphology of these two lines at high cell densities. Mv1Lu cells at high densities had uniform flat polygonal shape with microvilli at their surface. A marked diversity in cell morphology was characteristic of Ki-Mv1Lu cells at comparable cell densities: variation in shape, in thickness degrees, and in the expression of cell surface ultrastructure (microvilli, blebs, filopodia). No dependence of Ki-Mv1Lu cell morphology from cell densities was observed. At low cell densities of Mv1Lu cells, cells with the morphology differing from the typical pattern of confluent Mv1Lu cells were seen. Morphological diversity of these cells was comparable with that of Ki-Mv1Lu cells. Nothing has been found in cell surface morphology that could be absolutely specific for transformed cells only.