Winka, Fred and Tim in lab (IMAGE) Texas Biomedical Research Institute Caption Texas Biomed Staff Scientists Winka Le Clec’h, Frédéric Chevalier and Professor Tim Anderson check on snails that are a vector for the parasites that cause schistosomiasis. The Anderson lab maintains the full, complex lifecycle of the schistosome parasites, which pass through several larval stages before infecting humans where they transform into adult worms. Credit Texas Biomed Usage Restrictions Free to reuse with credit. License Original 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.