What are three microorganisms other than bacteria that can cause foodborne illnesses?

Three microorganisms other than bacteria that can cause foodborne illnesses are viruses, parasites, and fungi. Viruses, such as norovirus and hepatitis A, can lead to gastroenteritis and liver infections, respectively. Parasites like Giardia and Toxoplasma can contaminate food and water, causing gastrointestinal disorders. Fungi, including certain molds, can produce mycotoxins that lead to food poisoning when ingested.