<i>Salmonella typhimurium</i> (IMAGE) Wellcome Trust Sanger Institute Caption This is a color-enhanced scanning electron micrograph. Credit David Goulding, Wellcome Trust Sanger Institute Usage Restrictions None 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.