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Heartwater, caused by the rickettsial organism Cowdria ruminantium and transmitted by ticks of the genus Amblyomma, is considered to be the most important tick-borne disease of cattle in southern Africa, and is second only in importance to East Coast fever (theileriosis) in eastern Africa. This p...


O'Callaghan, C.J.Medley, G.F.Peter, T.F.Perry, Brian D.[Modelling the transmission dynamics of Cowdria ruminantium: Supporting the case for endemic stability]Modelling the transmission dynamics of Cowdria ruminantium: Supporting the case for endemic stability

Heartwater, an infectious disease of ruminants caused by the rickettsia Cowdria ruminantium (transmitted by ixodid ticks of the genus Amblyomma and vertically), severely constrains livestock production throughout sub-Saharan Africa. Its epidemiology varies from epidemics with high mortality (on i...


O'Callaghan, C.J.Medley, G.F.Peter, T.F.Mahan, S.M.Perry, Brian D.[Predicting the effect of vaccination of the transmission dynamics of heartwater (Cowdria ruminantium infection)]Predicting the effect of vaccination of the transmission dynamics of heartwater (Cowdria ruminantium infection)

Heartwater is a disease of high mortality in domestic ruminants (cattle, sheep and goats) in sub-Saharan Africa and in the Caribbean. An intracellular rickettsia, Cowdria ruminantium, is the cause of the disease and is transmitted by ticks of the genus Amblyomma. Losses due to heartwater are high...


Peter, T.F.O'Callaghan, C.J.Medley, G.F.Mahan, S.M.Perry, Brian D.[Biological support for modeling the transmission dynamics of cowdriosis]Biological support for modeling the transmission dynamics of cowdriosis

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