Can euglena make humans or animals sick?

Euglena, a type of single-celled organism, is generally not harmful to humans or animals and is primarily known for its role in aquatic ecosystems. While some species of Euglena can produce toxins under certain conditions, they are not typically associated with disease in humans or animals. Most euglena are considered safe and are even used as a dietary supplement due to their nutritional content. However, like any microorganism, they can contribute to algal blooms that may impact water quality.