Institute for Animal Health, Pirbright Laboratory, Ash Road, Pirbright, Surrey GU240NF, UK.
Emerg Infect Dis. 2009 Dec;15(12):2025-8. doi: 10.3201/eid1512.090788.
To determine whether transplacental transmission could explain overwintering of bluetongue virus in the United Kingdom, we studied calves born to dams naturally infected during pregnancy in 2007-08. Approximately 33% were infected transplacentally; some had compromised health. In all infected calves, viral load decreased after birth; no evidence of persistent infection was found.
为了确定胎盘传播是否可以解释在英国越冬的蓝舌病病毒，我们研究了 2007-08 年怀孕期间自然感染的母羊所生的小牛。大约 33%的小牛经胎盘感染；一些小牛的健康受到影响。所有感染的小牛在出生后病毒载量下降；没有发现持续感染的证据。
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