How Many Protozoa Are in the Water We Drink? (image) FECYT - Spanish Foundation for Science and Technology Share Print E-Mail Caption Parasitic protozoa can be ingested accidentally by humans when we drink water in recreational areas or even at home, if water, for some reason, is not completely clean when it reaches houses. Credit RayMark/Pixabay Usage Restrictions CC0 Public Domain Share Print E-Mail 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.