Jeroen Saeij
Toxoplasma, explained by someone who studies it.
I am a professor at the UC Davis School of Veterinary Medicine. For two decades my lab has worked out how Toxoplasma gondii, a parasite carried by roughly a third of humanity, gets into our cells and stays there. This is my personal site: plain-language answers about toxoplasmosis, and practical field guides for fellow bench scientists.
For everyone
Toxoplasmosis, answered
Pregnancy, cats, food, blood tests, the eye and the brain. What the evidence says, what is still unknown, and which scare stories you can ignore.
Read the answers →For scientists
Field guides for the bench
How to use AlphaFold, public RNA-seq data and CRISPR screens to get answers you can trust, and how to notice when the computer is fooling you.
See the guides →Latest
- Pets and livestock: toxoplasmosis, Neospora and Sarcocystis Toxoplasmosis, 17 September 2026
- Blood tests explained: IgG, IgM and avidity Toxoplasmosis, 17 September 2026
- The brain and behavior: what the evidence shows Toxoplasmosis, 17 September 2026
- Cats: what they do and what they do not do Toxoplasmosis, 17 September 2026
- The eye: ocular toxoplasmosis Toxoplasmosis, 17 September 2026
- Meat, water, soil and shellfish: infection beyond cats Toxoplasmosis, 17 September 2026