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Understanding the basis of protective immunity to Cowdria ruminantium will facilitate the development of an effective subunit vaccine against heartwater in ruminants and contribute to a better definition of protective immune mechanisms to obligate intracellular pathogens in general. Until recentl...


Totte, P.Bensaid, A.Mahan, S.M.Martínez, D.McKeever, Declan J.[Immune responses to Cowdria ruminantium infections]Immune responses to Cowdria ruminantium infections

Cowdria-specific CD4<sup(+)> T-cell lines generated from immunized cattle responded to both soluble and membrane proteins of the agent. The lines produced the Cowdria-inhibitory cytokine IFN-<gamma> in response to soluble antigens fractionated by gel filtration and fast performance liquid chromat...


Totte, P.Nyanjui, J.Bensaid, A.McKeever, Declan J.[Bovine CD4<sup(+)> T-cell lines reactive with soluble and membrane antigens of Cowdria ruminantium]Bovine CD4<sup(+)> T-cell lines reactive with soluble and membrane antigens of Cowdria ruminantium

Cattle were successfully immunized against heartwater with a lysate of Cowdria ruminantium formulated in Freund's adjuvant. Vaccinated animals proved fully resistant to virulent challenge 3 and 10 months after vaccination. For the first time a helper T lymphocyte response to Cowdria antigens was ...


Totte, P.McKeever, Declan J.Martínez, D.Bensaid, A.[Analysis of T-cell responses in cattle immunized against heartwater by vaccination with killed elementary bodies of Cowdria ruminantium]Analysis of T-cell responses in cattle immunized against heartwater by vaccination with killed elementary bodies of Cowdria ruminantium

The response of peripheral blood mononuclear cells (PBMC) collected from cattle immunized with killed C. ruminantium to MAP1, MAP1-B, MAP2 and to a lysate of Cowdria was characterized in vitro. CD4+ T lymphocytes responded strongly to Cowdria lysates while B cells and gamma delta T cells prolifer...


Totte, P.McKeever, Declan J.Jongejan, F.Barbet, A.Mahan, S.M.Mwangi, D.Bensaid, A.[Analysis of cellular responses to native and recombinant proteins of Cowdria ruminantium]Analysis of cellular responses to native and recombinant proteins of Cowdria ruminantium

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