瑞士阿尔卑斯山区公共牧场中，怀孕母畜所产犊牛感染牛病毒性腹泻病毒（BVDV）的风险增加。

Increased risk of BVDV infection of calves from pregnant dams on communal Alpine pastures in Switzerland.

作者信息

Siegwart Nico, Hilbe Monika, Hässig Michael, Braun Ueli

机构信息

Department of Farm Animals, University of Zurich, Winterthurerstrasse 260, CH-8057 Zurich, Switzerland.

出版信息

Vet J. 2006 Sep;172(2):386-8. doi: 10.1016/j.tvjl.2005.07.018. Epub 2005 Sep 9.

DOI:10.1016/j.tvjl.2005.07.018

PMID:16154369

Abstract

Skin biopsies and blood samples from 117 calves, the offspring of dams that had been pastured on communal Alpine pastures while pregnant, were examined for bovine viral diarrhoea virus (BVDV) antigen. Immunohistochemical evaluation of skin biopsy samples revealed BVDV antigen in nine (7.7%) calves, and ELISA testing of serum samples was positive for BVDV antigen in six (5.1%). Three calves with positive skin biopsy samples and negative serum results were < 11 days old; it was assumed that maternal antibody interfered with the ELISA testing. Serum samples that were collected at a later date from two of the three calves were positive for BVDV antigen. These results were significantly different from those of a previous study in which the prevalence of persistently infected calves in an average Swiss cattle population was 0.64%. It was concluded that the risk of infection with BVDV is high in cattle sharing a communal Alpine pasture.

摘要

对117头犊牛的皮肤活检样本和血液样本进行了检测，这些犊牛是在孕期于阿尔卑斯山区公共牧场放牧的母牛所生。检测样本中是否存在牛病毒性腹泻病毒（BVDV）抗原。皮肤活检样本的免疫组化评估显示，9头（7.7%）犊牛存在BVDV抗原，血清样本的ELISA检测显示，6头（5.1%）犊牛的BVDV抗原呈阳性。3头皮肤活检样本呈阳性但血清检测结果为阴性的犊牛年龄小于11日龄；推测是母源抗体干扰了ELISA检测。后来从这3头犊牛中的2头采集的血清样本BVDV抗原呈阳性。这些结果与之前一项研究的结果存在显著差异，在那项研究中，瑞士普通牛群中持续感染犊牛的患病率为0.64%。得出的结论是，在共享阿尔卑斯山区公共牧场的牛群中，感染BVDV的风险很高。