Mushi, E.Z.; Binta, M.G.; Chabo, R.G.; Ndebele, R.T.; Verwoerd, Daniel Wynand
(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1999)
Sera from nine out of 30 (30,0 %) apparently healthy unvaccinated indigenous (Tswana) chickens had
precipitating antibodies to infectious bursal disease (IBD) virus using the agar gel precipitation test.
Similarly, sera ...