Group of Spirochetes (IMAGE) Oregon State University Caption This group of spirochetes, the type that cause lyme disease, were identified in a tick preserved in amber. Credit (Photo by George Poinar, Jr., courtesy of Oregon State University) 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.