Peter, T.F.; Perry, B.D. (Brian D.), 1946-; O'Callaghan, C.J.; Medley, G.F.; Shumba, W.; Madzima, W.; Burridge, M.J.; Mahan, S.M.; Verwoerd, Daniel Wynand(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1998)
Heartwater, the tick-borne disease caused by the rickettsia Cowdria ruminantium has historically been
confined to the southern and western lowvelds of Zimbabwe. Since 1986, however, cases of heartwater
have been diagnosed ...