Response of the regional lymph node to bluetongue virus infection in calves

Simon M. Barratt-Boyes, Paul V. Rossitto, Bernadette C. Taylor, John A. Ellis, Nigel J Maclachlan

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Bluetongue virus (BTV) infection of cattle is characterized by prolonged cell-associated viremia. In an effort to further evaluate the antiviral response of BTV-infected cattle, the role of the regional lymph node (LN) in the immune response of calves to BTV was characterized. Calves were inoculated with BTV in the skin of the neck in an area drained by the superficial cervical LN. Calves were euthanized at regular intervals after inoculation and both BTV-challenged and contralateral (control) superficial cervical LNs were harvested. In addition, some calves had cannulation of the superficial cervical efferent lymphatics prior to inoculation. Lymphocyte subpopulation analysis was done on LN cell suspensions and lymph cells using a panel of cell-specific monoclonal antibodies. There was a significant increase in the proportion of B cells in the challenged LN after inoculation as compared with the control LN. In addition, BTV-specific antibodies were detected in efferent lymph plasma from the challenged LN in one cannulated calf by 9 days after inoculation (DAI), as determined by competitive enzyme-linked immunosorbent assay, whereas BTV-specific antibodies were not detected in serum from this calf through 12 DAI. Analysis of lymph cells revealed a sustained increase in cell output from the challenged LN due to an increase in lymphoblasts and CD8+ T cells. In contrast, the cell output from the control LN dropped markedly by 8 DAI and there was no significant increase in any specific cell population. Double label analysis characterized lymphoblasts as activated CD8+ cells, as determined by expression of MHC Class II antigens (CD8+ MHC II+). These cells were only transiently present as CD8+ MHC II+ cells were not identified in lymph from the challenged LN at 14 DAI. Few CD8+ MHC II+ cells were identified at

Original languageEnglish (US)
Pages (from-to)73-84
Number of pages12
JournalVeterinary immunology and immunopathology
Issue number1-2
StatePublished - Mar 29 1995

ASJC Scopus subject areas

  • Immunology
  • veterinary(all)


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