amoeba (IMAGE) Flinders University Caption Light microscopic images of trophozoites (active form; image A, B and D) and cysts (dormant form; image: C and D circular in shape) of Acanthamoeba (image A, B and C) and Vermamoeba vermiformis (image D) shown at 100 times magnification. Credit Flinders University Usage Restrictions use only with this article 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.