[Induction of transplantable leukemia-like syndromes in mice by administration of antigens and immunostimulants].

Splenomegaly characterised by myeloid metaplasia was induced in BALB/c mice by the injection of antigens and immunostimulants. In difference from leukemoid reaction, this syndrome was transmissible both by the plasma and by the splenic cells. Small virus-like particles (30--50 nm) were revealed in the plasma, and RNA-containing viruses of type C--in the splenic cells.