Light Microscopic Study of Caryospora sp. (Apicomplexa: Eimeriidae) from Savigny’s Agama Trapelus savignii (Reptilia: Agamidae) in Egypt

Document Type : Original Article

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Department of Zoology and Entomology, Faculty of Science, Helwan University, Egypt

Abstract

Developmental stages of a suggested new speciesof CaryosporaLéger, 1904 were described from the agamid lizards Trapelus savigniicaptured during summer 2019 from the Eastern Desert in Egypt. Overall recorded prevalence is 11.65% (12/103) and sporulation is endogenous. Sporulated oocysts are subspherical (70%) to spherical (30%) measuring 22.29–35.74 ×20.91–32.89 μm (length × width). The oocyst wall is bilayered, smooth, and measures 1.46–2.00 μm. Distinctive features of most oocysts include the presence of a sutured edge-like extension on one side of the oocyst wall and the ability of sporocyst contents to form a condensed curved mass within the sporocyst cavity. One or rarely two polar granules are present. Micropyle and oocyst residuum are absent. Sporocysts are ovoid to ellipsoidal measuring 17.17–22.76 × 12.86–16.76 μm. The morphometric descriptions and measurements of Stieda, sub-Stieda bodies, and sporocyst residuum are determined. Sporozoites are sausage-shaped and measure 5.69–8.59 × 2.08–3.29 μm. Merogonic stages and microgamonts occur mainly in the enterocytes of the small intestine. Endogenous stages are seen mostly with clear large parasitophorous vacuoles. Mature meronts measure 3.95–7.60 × 3.37–7.24μm and yield 3–11 merozoites with the formation of a residual body.Merozoites are banana-shaped measuring 2.51–3.29 × 0.72–1.20μm. A microgamont is noticed measuring in 9.53 × 8.42 μm.

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