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T cells bearing the gamma delta antigen receptor (gamma delta T cells) can constitute up to 50 percent of T cells in the peripheral blood and lymphoid organs of young cattle. We present data showing that gamma delta T cells are involved in immune responses against Theileria parva. Gamma delta T c...


Daubenberger, C.A.Taracha, E.L.N.Gaidulis, L.Davis, W.C.McKeever, Declan J.[Bovine gamma delta T cell responses to the intracellular protozoan parasite Theileria parva]Bovine gamma delta T cell responses to the intracellular protozoan parasite Theileria parva

To evaluate vaccinia virus as a delivery system for recombinant antigen in cattle, calves were immunized with a recombinant vaccinia virus (rVV) expressing the sporozoite surface antigen (p67) of Theileria parva (V-67) combined with those expressing bovine IL-4 (V-IL4) or IL-2 (V-IL2). The anti-p...


Honda, Y.Waithaka, M.M.Taracha, E.L.N.Duchateau, L.Musoke, A.J.McKeever, Declan J.[Delivery of the Theileria parva p67 antigen to cattle using recombinant vaccinia virus: IL-2 enhances protection]Delivery of the Theileria parva p67 antigen to cattle using recombinant vaccinia virus: IL-2 enhances protection

Immunity against the bovine intracellular protozoan parasite Theileria parva has been shown to be mediated through the destruction of parasite infected lymphocytes by MHC class I restricted CD8+ CTL. Six parasite proteins targeted by CTL from T. parva immune cattle have been identified and raised...


Graham, S.P.Pelle, RogerVilliers, Etienne P. deYamage, M.Mwangi, D.M.Honda, Y.Ellis, S.A.MacHugh, Niall D.Morrison, W. IvanTaracha, E.L.N.[Identification of bovine cytotoxic T lymphocyte epitopes on the intracellular parasite Theileria Parva]Identification of bovine cytotoxic T lymphocyte epitopes on the intracellular parasite Theileria Parva

Enhancement of the induction of cytotoxic T-cell responses by immunostimulatory CpG oligodeoxynucleotides has been described in humans and mouse models. The present study attempted to address whether CpG has a similar effect in cattle. Immunisation of cattle with a recombinant form of the polymor...


Graham, S.P.Saya, R.Awino, EliasNgugi, D.Nyanjui, J.K.Hecker, R.Taracha, E.L.N.Nene, Vishvanath[Immunostimulatory CpG oligodeoxynucleotides enhance the induction of bovine CD4+ cytotoxic T-lymphocyte responses against the polymorphic immunodominant molecule of the protozoan parasite Theileria parva]Immunostimulatory CpG oligodeoxynucleotides enhance the induction of bovine CD4+ cytotoxic T-lymphocyte responses against the polymorphic immunodominant molecule of the protozoan parasite Theileria parva

We describe a highly sensitive, non-radioactive assay for T cell activation, based on the rapid induction of class II MHC expression by constitutively negative bovine endothelial cells, when cultured in the presence of supernatants derived from activated bovine T cells. We demonstrate the effecti...


Ballingall, K.T.Mwangi, D.M.MacHugh, Niall D.Taracha, E.L.N.Totte, P.McKeever, Declan J.[A highly sensitive, non-radioactive assay for T cell activation in cattle: Applications in screening for antigens recognised by CD4+ and CD8+ T cells]A highly sensitive, non-radioactive assay for T cell activation in cattle: Applications in screening for antigens recognised by CD4+ and CD8+ T cells

There is strong evidence that class I MHC-restricted parasite-specific CD8+ CTL protect cattle against the protozoan parasite Theileria parva. As part of an effort to develop a subunit vaccine for the induction of these responses, we have investigated the factors involved in the generation of T. ...


Taracha, E.L.N.Awino, EliasMcKeever, Declan J.[Distinct CD4 + T cell helper requirements in Theileria parva-immune and -naive bovine CTL precursors]Distinct CD4 + T cell helper requirements in Theileria parva-immune and -naive bovine CTL precursors
Howard, C.J.Sopp, P.Parsons, K.R.McKeever, Declan J.Taracha, E.L.N.Jones, B.V.MacHugh, Niall D.Morrison, W. Ivan[Distinction of naive and memory BoCD4 lymphocytes in calves with a monoclonal antibody, CC76, to a restricted determinant of the bovine leukocyte-common antigen, CD45]Distinction of naive and memory BoCD4 lymphocytes in calves with a monoclonal antibody, CC76, to a restricted determinant of the bovine leukocyte-common antigen, CD45

Heterologous priming-boosting vaccination regimens involving priming with plasmid DNA antigen constructs and inoculating (boosting) with the same recombinant antigen expressed in replication-attenuated poxviruses have recently been demonstrated to induce immunity, based on CD4(+)- and CD8(+)-T-c...


Taracha, E.L.N.Bishop, Richard P.Musoke, A.J.Hill, A.V.S.Gilbert, S.C.[Heterologous priming-boosting immunization of cattle with Mycobacterium tuberculosis 85A induces antigen-specific T-cell responses]Heterologous priming-boosting immunization of cattle with Mycobacterium tuberculosis 85A induces antigen-specific T-cell responses

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