Plowright W, Edington N, Watt R G
J Hyg (Lond). 1976 Feb;76(1):125-35. doi: 10.1017/s0022172400055017.
A longitudinal, virological and serological study of pigs in two herds with respiratory disease showed that infection by porcine cytomegalovirus (PCMV) was universal in both. Virus excretion usually began when piglets were between 3 and 6 weeks of age and reached a maximum between 5 and 8 weeks; it was usually no longer detectable at 11-12 weeks. Antibody demonstrable in indirect immunofluorescence (IIF) tests was present to moderate or high titre in all piglets at 2-3 weeks. This was presumed to be maternal in origin as it declined in titre between 2-3 and 5-6 weeks. After this fall the majority of piglets showed seroconversion as a result of virus infection. One group of 12 pigs in which infection occurred earlier than usual showed a very poor antibody response, which, nevertheless, persisted through to week 27. The findings are discussed with relation to porcine atrophic rhinitis and cytomegalovirus infection in other species.
对两个患有呼吸道疾病猪群的猪进行的一项纵向病毒学和血清学研究表明，猪巨细胞病毒（PCMV）感染在两个猪群中都很普遍。病毒排泄通常在仔猪3至6周龄时开始，并在5至8周龄时达到高峰；通常在11至12周龄时不再能检测到。在间接免疫荧光（IIF）试验中可检测到的抗体在2至3周龄的所有仔猪中呈中度或高滴度。这被认为是母源的，因为其滴度在2至3周龄和5至6周龄之间下降。在此下降之后，大多数仔猪由于病毒感染而出现血清转化。一组12头猪的感染比平常更早发生，其抗体反应非常差，但这种情况一直持续到第27周。结合猪萎缩性鼻炎和其他物种的巨细胞病毒感染对这些发现进行了讨论。
