Abstract
Developmental stages of a suggested new speciesof CaryosporaLeger, 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.
Highlights
Genus Caryospora Léger, 1904 is a coccidian parasite infecting mainly snakes and raptors (Upton et al, 1986; Duszynski et al, 2003)
The present study aims to investigate and discuss the characteristic features of exogenous and endogenous stages of the present Caryopsora species from the Savigny’s Agama Trapelus savignii in Egypt by light microscopy
1- Prevalence: Twelve out of one hundred and three (11.65%) agamid lizards Trapelus savignii were found to be naturally infected with oocysts of the present Caryospora species
Summary
Genus Caryospora Léger, 1904 is a coccidian parasite infecting mainly snakes and raptors (Upton et al, 1986; Duszynski et al, 2003). Striated or pitted oocyst wall was seen in many Caryospora species such as C. ernsti (Upton et al, 1984a), C. peruensis (Upton et al, 1989), C. barnardae, C. brygooi, C. serpentis (Upton et al, 1990), C. carajasensis, C. epicratesi, C. pseustesi (Lainson et al, 1991), C. heterodermus (Upton et al, 1992a), C. gracilis (Upton et al, 1992b), C. kalimantanensis (Modrý and Koudela, 1997), C. veselyi (Modrý and Koudela, 1998), C. matatu (Modrý et al, 2002), C. conophae, C. coniophanis, C. guatemalensis, C. mayorum, C. zacapensis (Seville et al, 2005), C. olfersii (Viana et al, 2013) and C. ceadsensis (de Santana Miglionico and Viana, 2017).
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