What type of cell is parasites?

Parasites can be classified as eukaryotic cells, as they possess a defined nucleus and membrane-bound organelles. They can be unicellular, like protozoa, or multicellular, like helminths (worms). Some parasites, such as bacteria and certain protozoa, may also be prokaryotic or simple in structure, but the most commonly referenced parasites in the context of human disease are eukaryotic.