An Alternative to Antibiotics (image) Fraunhofer-Gesellschaft Caption Here it can be clearly seen that the antimicrobial peptides have prevented the growth of bacteria, in this case Streptococcus mutans, which causes tooth decay. Credit © Fraunhofer IZI Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. 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.