Researchers have analyzed drinking water and detected oocysts of Cryptosporidium and cysts of Giardia, two protozoa that cause outbreaks of diarrhea in humans. The levels detected are very low and do ...

Parasitic protozoa are unicellular eukaryotic pathogens that dwell inside host cells and/or in extracellular fluids. These organisms typically produce long-lasting chronic infections in order to ...

A new test using protozoa — single-celled organisms — has been developed by U.K. researchers, who say it has "great potential" for reducing the use of animals to determine the safety of cosmetics.