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Heartwater is a severe tick-borne, non-contagious disease of ruminant livestock caused by the rickettsia Cowdria ruminantium, which is endemic in much of sub-Saharan Africa and in the Caribbean. Transmission occurs via ticks of the Amblyomma genus, primarily A. variegatum and A. hebraeum. Intense...


Peter, T.F.O'Callaghan, C.J.Perry, Brian D.Medley, G.F.Mahan, S.[Application of PCR in heartwater epidemiology]Application of PCR in heartwater epidemiology

Heartwater, a disease of ruminants caused by the rickettsia Cowdria ruminantium and transmitted by ticks of the genus Amblyomma, is a significant cause of productivity losses in cattle, sheep and goats in most of sub-Saharan Africa. In southern Africa, the vector of C. ruminantium is A. hebraeum....


Perry, Brian D.Chamboko, TafireyiMahan, S.Medley, G.F.Mukhebi, A.W.O'Callaghan, C.J.Peter, T.F.[A study of the effects of heartwater and its control on livestock productivity and economics in Zimbabwe]A study of the effects of heartwater and its control on livestock productivity and economics in Zimbabwe

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
Perry, Brian D.Norval, R.A.I.Kruska, R.L.Ushewokunze-Obatolu, U.Booth, T.[Predicting the epidemiology of tick-borne diseases of cattle in Zimbabwe using geographic information systems]Predicting the epidemiology of tick-borne diseases of cattle in Zimbabwe using geographic information systems

This paper studies East Coast fever (Theileria parva infection) risk in four district smallholder-farming areas of Kenya representing a range of epidemiological states of the disease. The areas include Kakamega, where indigenous cattle are intensively grazed with minimal tick control under modera...


Kiara, Henry K.O'Callaghan, C.J.Randolph, Thomas F.McDermott, John J.Perry, Brian D.[Targeting East Coast fever control strategies based on the assessment of biological risk]Targeting East Coast fever control strategies based on the assessment of biological risk

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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