Dermo Shift (IMAGE) Virginia Institute of Marine Science Caption Panel A shows the original form of the Dermo parasite Perkinsus marinus, with black arrows indicating typical Dermo cells and the white arrow a dividing form, all infecting connective tissues deep inside an oyster. Panel B shows the new form of the parasite, much smaller, with the arrow indicating a mass of dozens of Dermo cells inside a single oyster blood cell, and primarily infecting the lining of the stomach and gut. Credit © R. Carnegie/VIMS. Usage Restrictions One-time use only. 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.