Oral Bacteria (IMAGE) Forsyth Institute Caption Scientists know the genetic makeup of about 70 percent of oral bacteria. What they don't know is which species would live the longest without nutrients in a 'battle royale' -- so they decided to find out. Credit Jessica Mark Welch and Gary Borisy, PNAS.1522149113 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.