<I>Salmonella typhimurium</I> (IMAGE) Arizona State University Caption This is a color-enhanced scanning electron micrograph showing Salmonella typhimurium (red) invading cultured human cells. Credit Rocky Mountain Laboratories, NIAID, NIH 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.