Pleistophora, is a genus of microsporidian parasite. It is known also as Neon Tetra Disease for it’s prevalence among Neon Tetra fish. It has been found to infect Characins, Cichlids, Cyprininds, and many carp-like fish also. It is characterized by discoloration of epidermal tissue especially beneath the dorsal fin. Other symptoms include emaciation, deterioration of fins, and erratic swimming. Pleistophora infects its host most commonly through consumption of contaminated materials. Once in the intestinal tract, parasite embryos pass through the instestinal wall and produce cysts in muscle tissues, causing the tissue to turn nectrotic, and eventually becoming pale in color. Pleistophora may be mistaken for a bacterial infection called False Neon Disease, which has very similar clinical signs. There are no known cures or treatments for Pleistophora.