Transfer of embryos from bovine leukaemia virus-infected cattle to uninfected recipients: preliminary results.
One hundred and fifty-one, day 6 or 7, embryos collected from cattle infected with bovine leukaemia virus (BLV) were transferred to uninfected recipients. Thirty-two pregnancies resulted. Two animals aborted at seven months. Three sets of twins and one single calf were still-born. The remaining 26 pregnancies produced 27 live calves which were raised to six months of age. All of the recipients, pregnant and non-pregnant, and all of the calves remained serologically negative for antibodies to BLV-glycoprotein antigen.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000517:prevention & control*; D004624:Embryo Transfer; D005260:Female; D007938:Leukemia / Q000517:prevention & control / Q000662:veterinary*; D001909:Leukemia Virus, Bovine; D011247:Pregnancy