de Leeuw P W, Ellens D J, Talmon F P, Zimmer G N, Kommerij R
Res Vet Sci. 1980 Sep;29(2):142-7. doi: 10.1016/S0034-5288(18)32654-7.
A commercially available modified live reovirus-like (rotavirus) vaccine proved innocuous in calves deprived of colostrum and protected one out of three calves against challenge 72 h after vaccination. The vaccine was evaluated in two dairy herds in the 1977 calf season. No significant differences were observed in the incidence rates or severity of undifferentiated neonatal calf diarrhoea or rotavirus-associated late diarrhoea between calves given a placebo (76) and vaccinated (74) calves in these herds. Samples of colostrum contained specific antibodies against rotavirus and neutralisation of the vaccine virus by colostral antibody in the intestinal tract was considered the major reason for the failure of the vaccine to reduce the incidence of neonatal diarrhoea in these herds.
一种市售的改良活呼肠孤病毒样(轮状病毒)疫苗在未摄入初乳的犊牛中被证明是无害的,并且在接种疫苗72小时后,三头犊牛中有一头受到了保护,免受攻击。该疫苗在1977年犊牛季的两个奶牛场进行了评估。在这些牛群中,给予安慰剂的犊牛(76头)和接种疫苗的犊牛(74头)之间,未分化的新生犊牛腹泻或轮状病毒相关的晚期腹泻的发病率或严重程度没有观察到显著差异。初乳样本中含有针对轮状病毒的特异性抗体,肠道中初乳抗体对疫苗病毒的中和作用被认为是该疫苗未能降低这些牛群中新生犊牛腹泻发病率的主要原因。