Research Interests

I am a veterinarian parasitologist interested in transmission of zoonotic parasitic diseases from animals to humans, and the discovery of new diseases that cause crippling diseases in humans and animals. I am most associated with the discovery of the transmission of the parasite Toxoplasma gondii to humans and animals through feces of cats and by eating undercooked infected meat. One-third of humanity is infected with T. gondii, and toxoplasmosis causes birth defects and loss of vision in humans and abortion in livestock. I cultivated and named the single celled parasite Neospora caninum, that causes abortion in cattle and crippling disease in companion animals. I also named the parasite Sarcocystis neurona that causes a fatal neurologic disease in horses in Americas. There are no effective vaccines or drugs to eliminate these parasites in tissues. Control measures for these diseases and/or prevention of transmission to humans are based on farm management practices and hygienic measures based largely on the research that we have published.

Membership Type


Election Year


Primary Section

Section 61: Animal, Nutritional, and Applied Microbial Sciences

Secondary Section

Section 44: Microbial Biology