Imperiled Wood Frog (image) National Institute for Mathematical and Biological Synthesis (NIMBioS) Share Print E-Mail Caption Ranavirus infection could contribute to extinction of wood frogs in populations that are demographically isolated. Credit Thomas Brown Usage Restrictions Please attribute. Share Print E-Mail 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.