A group (or phylum) of flagellated, anaerobic EUKARYOTES that are endosymbionts of animals. They lack mitochondria but contain small energy-producing hydrogenosomes. The group is comprised of two major classes: HYPERMASTIGIA and TRICHOMONADIDA.
Subtype terms (2)
More specific conditions that are subtypes of Parabasalidea in the MeSH hierarchy.