Toxoplasmosis Researchers (IMAGE) Walter and Eliza Hall Institute Caption Walter and Eliza Hall Institute researchers (L-R) Dr Alex Uboldi, Ms Mary-Louise Wilde and Associate Professor Chris Tonkin discovered a way to halt the invasion of the toxoplasmosis-causing parasite into cells, depriving the parasite of a key factor necessary for its growth. Credit Walter and Eliza Hall Institute, Australia Usage Restrictions With credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.