Bad Stomach (IMAGE) Rockefeller University Caption The researchers performed experiments in C. elegans worms infected with Salmonella bacteria. In this cross section of a worm, the rod-shaped microbes have invaded the animal's intestine, highlighted in purple. Credit The Rockefeller University Usage Restrictions Image may be used only to illustrate the research described in the accompanying release. 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.