ABSTRACT
The phylum Apicomplexa contains many organisms of veterinary and medical importance. Coccidia make up a large portion of this phylum. The coccidia that cause human and animal infections include Toxoplasma gondii, Sarcocystis spp., Cyclospora spp., and Isospora spp.1 The genus Isospora forms oocysts with two sporocysts, containing four sporozoites each. They are intracellular parasites, mainly of the gastrointestinal tract of the host. The life cycle consists of three stages: merogony (asexual cycle), gametogony (sexual cycle) both taking place in the host, and nally sporogony, which takes place outside the host. About 200 species of Isospora have been named.2
