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Effects of experimental infection with Border disease virus on lymphocyte subpopulations in the peripheral blood of lambs

Research in Veterinary Science, ISSN: 0034-5288, Vol: 56, Issue: 2, Page: 201-207
1994
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Article Description

Experimental infection with Border disease virus was characterised by significant changes in the total numbers of leucocytes and neutrophils, and in the proportions and numbers of the different lymphocyte subpopulations. Three days after experimental infection there was significant leucopenia due to lymphocytopenia and neutropenia (P<0·001). The lymphocytopenia and neutropenia lasted for up to seven days after inoculation. The lymphocytopenia was due to a reduction in the number of both T cells and B cells. During the early period of infection, the reduction in T cells was mainly due to a reduction in the number of OvCD4+ and T-19+ lymphocytes as the number of circulating OvCD8+ cells was not significantly affected. The cells expressing the OvCD4 and OvWC1 epitopes returned to pre-inoculation values 10 and 14 days after inoculation, respectively. In contrast, during the same period, the number of T cells expressing the OvCD8 molecule became significantly higher than the corresponding pre-inoculation values. There were no significant changes in all the T cell subsets in the control lambs.

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