(phylum Protozoa, subphylum Sporozoa)
A class of Protozoa which are parasitic in a range of vertebrates, where they infect red and white blood cells, and cells of the liver. A second (invertebrate) host is required for completion of the life cycle. There is one order, with two families. The class includes some important pathogens of domestic animals.
Subjects: Zoology and Animal Sciences.