Concerning Cargo (image) Boston Children's Hospital Share Print E-Mail Caption Botulinum toxin was able to jump into a new type of bacteria, Enterococcus, through plasmids, mobile structures that contain DNA independently of the chromosomes and can be swapped from one bacterium to another. Credit Elena Hartley Usage Restrictions Please credit as indicated. 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.