What is Toxoplasmosis? Rhesusnegative.net 3 years ago Watch this video: Robert Morris Sapolsky is an American neuroendocrinology researcher and author. He is currently a professor of biology, and professor of neurology and neurological sciences and, by courtesy, neurosurgery, at Stanford University. In addition, he is a research associate at the National Museums of Kenya. Here is why it matters to Rh negatives: Toxoplasmosis is a disease that results from infection with the Toxoplasma gondii parasite, one of the world’s most common parasites. Infection usually occurs by eating undercooked contaminated meat, exposure from infected cat feces, or mother-to-child transmission during pregnancy. See also: What is your IQ? (… and do you have Toxoplasmosis?)