Cryptosporidium Trophozoites (IMAGE) WashU Medicine Caption These are Cryptosporidium parasites in the trophozoite phase of their life cycle attach to an intestinal cell in vitro. Researchers at Washington University School of Medicine in St. Louis have figured out how to grow the intestinal parasite in a dish, which will aid efforts to understand and treat it. Credit David Sibley Usage Restrictions This image is to be used in accordance with the mission, policies and guidelines of Washington University in St. Louis. Visit https://wustl.edu/about/compliance-policies/media-policies/photo-use/ for more information. 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.