(IMAGE) McGill University Health Centre Caption These are small extra-cellular vesicles called exosomes (indicated by the red arrows) being released by the Leishmaniasis parasite. Credit Dr. Martin Olivier, Research Institute of the McGill University Health Centre Usage Restrictions Credit author 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.