Fourie, P.J.J.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E.
(Published by The Government Printer, Pretoria, 1952)
In testing the Onderstepoort herd of experimental animals, totalling 224
animals, 10 positive reactors were found in 1949. Since tuberculosis was eradicated
from this herd in 1940 by slaughtering all reactors and doubtful ...