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This study documented the effect on the productivity of Dorper-Merino cross ewes when they became infected with Cowdria ruminantium as would occur in an endemically stable state. A flock of 152 breeding ewes was randomly divided into two matched groups. One group was infected on multiple occasion...


Martínez, T.A.Meltzer, M.I.Perry, Brian D.Burridge, M.J.Mahan, S.M.[The effect of subclinical experimental Cowdria ruminantium infection on the health and reproductive performance of breeding ewes]The effect of subclinical experimental Cowdria ruminantium infection on the health and reproductive performance of breeding ewes

Three species of wild African ruminants. impala (Aepyceros melampus), sable (Hippotragus equinus, and tsessebe (Damaliscus lunatus), were experimentally inoculated with in vitro culture-derived Cowdria ruminantium organisms, the tick-borne causative agent of heartwater in domestic ruminants, to d...


Peter, T.F.Anderson, E.C.Burridge, M.J.Perry, Brian D.Mahan, S.M.[Susceptibility and carrier status of impala, sable and tsessebe for Cowdria ruminantium infection (heartwater)]Susceptibility and carrier status of impala, sable and tsessebe for Cowdria ruminantium infection (heartwater)

A mathematical description of the transmission dynamics of the tick-borne infection Cowdria ruminantium in commercial beef enterprises in Zimbabwe was used to consider the potential impact of a candidate vaccine to prevent heartwater. The important characteristics of the vaccine were (1) a delay ...


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

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