Swabbing Litoria wilcoxii (image) Smithsonian Tropical Research Institute Caption Very few countries have testing programs in place to prevent the spread of chytridiomycosis, which infects the skin of amphibians. Samples for quantitative PCR disease testing are obtained from frog skin using a cotton swab. Credit Save The Frogs! Usage Restrictions Credit: Save the Frogs! 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.