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The authors highlight the reliance on repeated natural infections by tickborne pathogens to maintain immunity in immunized herds. That incidence of clinical heartwater in cattle, caused by Cowdria ruminantium, is low while intensive acaricide use interrupts transmission of pathogens. Evidence is ...


Perry, Brian D.Chamboko, TafireyiMahan, S.M.Medley, G.F.Minjauw, B.O'Callaghan, C.J.Peter, T.F.[The economics of integrated tick and tick-borne disease control on commercial farms in Zimbabwe]The economics of integrated tick and tick-borne disease control on commercial farms in Zimbabwe

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 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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