(IMAGE) Institut Pasteur Caption Duffy-negative erythroblasts (at D9 of erythroid progenitor differentiation) infected with a Madagascan isolate of Plasmodium vivax observed by light microscopy (mature stage). Credit © Isabelle Bouyssou & Didier Menard (Institut Pasteur, University of Strasbourg) Usage Restrictions Please full copyright when using this image. License Original 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.