Virulent <i>Candida albicans</i> (IMAGE) Johns Hopkins Medicine Caption When it enters the bloodstream, the normally harmless fungus Candida albicans can form extensions called hyphae in order to penetrate host tissue (left). On right, hyphae (green) invade intestinal cells (red, with nuclei stained blue). Credit Rajini Rao Usage Restrictions Permission required 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.