Combrink, M.P.; De Waal, D.T.; Troskie, P.C.; Verwoerd, Daniel Wynand
(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
Three milliliters of blood from the present commercially produced heartwater infective blood vaccine
(Ball3 stock) was experimentally tested in sheep and cattle for infectivity and efficacy. Results obtained
for this ...