Deem, S.L., Donachie, P.L., Norval, R.A.I. 1996.Colostrum from dams living in a area influences calfhood immunity to Cowdria ruminantium. Veterinary Parasitology 61: 133-144. Deem, S.L., Norval, R.A.I., Donachie, P.L., Mahan, S.M. 1996. Demonstration of vertical transmission of Cowdria ruminantium, the causative agent of heartwater, from cows to their calves. Veterinary Parasitology 61: 119-132. Mahan, S.M., Smith, G.E., Kumbula, D., Burridge, M.J., Barbet, A.F. 2001. Reduction in mortality from heartwater in cattle, sheep and goats exposed to field challenge using an inactivated vaccine. Veterinary Parasitology 97: 295-308. Norval, R.A.I., Donachie, P.L., Meltzer, M.I., Deem, S.L., Mahan, S.M. 1995. The relationship between tick (Amblyomma hebraeum) infestation and immunity to heartwater (Cowdria ruminantium infection) in calves in Zimbabwe. Veterinary Parasitology 58: 335-352. Yonow, T., Brewster, C.C., Allen, J.C., Meltzer, M.I. 1998. Models for heartwater epidemiology: practical implications and suggestions for future research. Onderstepoort Journal of Veterinary Research 65: 263-273. Shkap, V., De Vos, A.J., Zweygarth, E., Jongejan, F. 2007. Attenuated vaccines for tropical theileriosis, babesiosis and heartwater: the continuing necessity. Trends in Parasitology 23:
Deem, S.L., Donachie, P.L., Norval, R.A.I. 1996.Colostrum from dams living in a area influences calfhood immunity to Cowdria ruminantium. Veterinary Parasitology 61: 133-144. Deem, S.L., Norval, R.A.I., Donachie, P.L., Mahan, S.M. 1996. Demonstration of vertical transmission of Cowdria ruminantium, the causative agent of heartwater, from cows to their calves. Veterinary Parasitology 61: 119-132. Mahan, S.M., Smith, G.E., Kumbula, D., Burridge, M.J., Barbet, A.F. 2001. Reduction in mortality from heartwater in cattle, sheep and goats exposed to field challenge using an inactivated vaccine. Veterinary Parasitology 97: 295-308. Norval, R.A.I., Donachie, P.L., Meltzer, M.I., Deem, S.L., Mahan, S.M. 1995. The relationship between tick (Amblyomma hebraeum) infestation and immunity to heartwater (Cowdria ruminantium infection) in calves in Zimbabwe. Veterinary Parasitology 58: 335-352. Yonow, T., Brewster, C.C., Allen, J.C., Meltzer, M.I. 1998. Models for heartwater epidemiology: practical implications and suggestions for future research. Onderstepoort Journal of Veterinary Research 65: 263-273. Shkap, V., De Vos, A.J., Zweygarth, E., Jongejan, F. 2007. Attenuated vaccines for tropical theileriosis, babesiosis and heartwater: the continuing necessity. Trends in Parasitology 23:
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