Tsutsumanski V, Genov I
Vet Med Nauki. 1984;21(7-8):62-7.
Studied was the occasional role played by vertical transmission of the leukotic infection via the placenta under experimental conditions and in the field. Studies were also carried out to establish the transmission of the infection through the semen as well, using bull semen and test lambs as most susceptible to the virus of bovine leukosis. It was found that at the experimental infection of sheep with the bovine leukosis virus intraplacental infection of part of the fetuses took place. On dairy farms with a widely spread infection (more than 50 per cent) in cattle the newborn calves were found to respond positively immediately after birth and prior to sucking colostrum, having specific leukosis antibodies, though in a low percent. No transmission of leukosis was found with the semen of leujotic bulls.
研究了在实验条件下和实际情况下，白血病感染通过胎盘垂直传播所起的偶然作用。还进行了研究以确定感染是否也通过精液传播，使用公牛精液和最易感染牛白血病病毒的试验羔羊进行实验。结果发现，用牛白血病病毒对绵羊进行实验性感染时，部分胎儿发生了胎盘内感染。在牛群中感染广泛传播（超过50%）的奶牛场，发现新生犊牛在出生后立即且在吸吮初乳之前就有阳性反应，带有特异性白血病抗体，不过比例较低。未发现患白血病公牛的精液能传播白血病。
