Dr. J. P. Dubey is a veterinarian parasitologist committed to the control of parasitic diseases. He has pioneered the diagnosis and control of three parasitic diseases—Toxoplasmosis, Sarcocystosis, and Neosporosis—which cause economic losses to livestock growers and needless suffering to humans. He was instrumental in developing methods to prevent the spread of these diseases. He is one of the most-cited scientists in veterinary medicine. His most significant contributions are the discovery of the life cycle of Toxoplasma, the discovery and naming of the protozoa Neospora caninum that causes abortion in cattle, and the discovery of Sarcocystis neurona that kills horses.