Petri dish (IMAGE) American Society of Agronomy Caption Bacterial isolate from reused litter with competitive exclusion potential against Salmonella growing on sheep blood agar. Credit Caroline Plymel Usage Restrictions For use with this story only 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.