Malarial Parasites (IMAGE) St. Jude Children's Research Hospital Caption Malaria is caused by the Plasmodium parasite, which is transmitted through the bite of an infected mosquito. Image shows malarial parasites (in green) infecting a red blood cell. Credit St. Jude Children's Research Hospital Usage Restrictions Image may only be used with appropriate caption and 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.