Infection Turns Non-farmers Into Farmers (IMAGE) Washington University in St. Louis Caption In a twist on an already surprising symbiosis, scientists at Washington University in St. Louis have discovered that infection with an inedible bacteria transforms social amoebae from nonfarmers into primitive farmers who carry with them edible bacteria. Credit E. Magdalena L. Usage Restrictions Please 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.