Pythium ultimum (1 of 2) (image) Helmholtz Association Caption Micrograph of the mycelia-forming soil microorganism Pythium ultimum transporting the contaminant phenanthrene in its hyphae: Overlay of a light transmission and a fluorescence micrograph of Pythium ultimum. The hyphae contain phenanthrene-enriched vesicles that fluoresce in blue (bar length: 5 micrometers). Credit Photo: Susan Foß/UFZ Usage Restrictions None 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.