Du Plessis, J.L.; Boersema, B.R.; Van Strijp, M.F.; Verwoerd, Daniel Wynand
(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
High levels of seropositivity, in all probability attributable to Ehrlichia, were recorded in the serum of
domestic ruminants throughout districts in South Africa where Amblyomma hebraeum, the vector of
the heartwater ...