Willem Daniel Malherbe obtained his BVSc degree at the Veterinary Faculty of the University of Pretoria in 1932. He joined the Division of Veterinary Services of the Department of Agriculture and served as State Veterinarian at Middelburg (Cape Province), Wellington and Potchefstroom. In 1942 he was transferred to Onderstepoort, first as lecturer and later as professor of veterinary medicine. In 1958 he became head of the Department of Clinical Pathology, and in 1973 joined the Department of Toxicology of the Onderstepoort Veterinary Research Institute until his retirement in 1975. His research included studies of various diseases in dogs, namely Babesia infections (Annals of the New York Academy of Sciences, 1956 and a series of five papers in the Journal of the South African Veterinary Medical Association (SAVA), 1965-1966); Rickettsiosis (South African Journal of Science, 1947; SAVA, 1948); and other diseases (SAVA, 1950, 1951, 1954); and Bilharziasis in sheep (Onderstepoort Journal of Veterinary Research, 1970).