The symplast-forming capacity of oncornavirus of continuous J-96 cells was studied by KS-test. Syncytia were formed upon combined cultivation of KS cells with J-96 cells and cells of human embryo skin-muscle tissue infected with J-96 virus as well as upon direct inoculation of KS cells with oncornavirus J-96. Formation of syncytia of KS cells correlated with the amount of J-96 cell oncornavirus. The possibility of using KS-test for titration of J-96 virus and antibody to it has been demonstrated.
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