(leukaemia in cattle) , , .
. ( ) Bovine Leukemia virus, Retroviridae, Oncoviridae .
. . . . . . in vitr, . 2500 .
. 2 . 3- . : ; 2- ; 1 3- , . , ( ) . 5-8 . , . , , , , .
, , , , , . , . , , . , , .
. , , .
, .
. , , gp 51, gp 30, p24. , .
. 20% . 20% . , .