title: Isospora riyadhensis n. sp. (Apicomplexa: Eimeriidae) from the worm lizard Diplometopon zarudnyi Nikolskii (Amphisbaenia: Trogonophidae) in Saudi Arabia.
abstract: Isospora riyadhensis n. sp. is described from the intestine of the worm lizard Diplometopon zarudnyi Nikolskii in Saudi Arabia, where its prevalence was 26.6%. Its oöcysts are spherical to subspherical and measure 23 × 20 μm. The sporocysts, which are tetrazoic and ovoid, measure 13 × 8 μm, whereas their sporozoites are banana-shaped, have anterior and posterior refractile bodies and measure 12 × 3 μm. Oöcysts are passed unsporulated, and the majority become fully sporulated within 3 days at 25 ° C. All endogenous stages develop in the cytoplasm of epithelial cells in the posterior region of the small intestine, from where meronts, microgamonts and macrogamonts are described.
authors: Zoology Department, College of Science, King Saud University, PO Box 2455, Riyadh 11451, Saudi Arabia. azema1@yahoo.com
authors: Abdel-Azeem Sh
authors: AA
authors: Abdel-Baki
authors: Saleh
authors: S
authors: Al-Quraishy
mesh_terms: D000818:Animals; D004847:Epithelial Cells / Q000469:parasitology; D005243:Feces / Q000469:parasitology; D007422:Intestines / Q000469:parasitology*; D007549:Isospora / Q000648:ultrastructure*; D021865:Isosporiasis / Q000469:parasitology / Q000662:veterinary*; D008116:Lizards / Q000469:parasitology*; D033661:Oocysts / Q000648:ultrastructure; D015995:Prevalence; D012529:Saudi Arabia / Q000453:epidemiology; D034101:Sporozoites / Q000648:ultrastructure