Malaria in the Blood (IMAGE) Walter and Eliza Hall Institute Caption Malaria is caused by a parasite which reproduces within red blood cells before being spread by mosquitos. A new blood test has been developed for detecting recent exposure to 'relapsing' or vivax malaria. Image from WEHI.TV Malaria animation Credit Walter and Eliza Hall Institute, Australia Usage Restrictions with credit 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.