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International Journal of Zoological Research

Year: 2011 | Volume: 7 | Issue: 1 | Page No.: 85-92
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Authors

S.A. Omer

A. Apio

T. Wronski

O.B. Mohammed

Keywords

Research Article

A New Coccidian Parasite (Eimeria farasanii n. sp.) Indicates Parasite-Host Specificity in Endemic Farasan Gazelle

S.A. Omer, A. Apio, T. Wronski and O.B. Mohammed
The aim of this study was to describe a new species of Eimeria from Farasan gazelle which has not been described before. Faecal examination of 24 Farasan gazelles, Gazella gazelle farasani collected on Frasan Kebir (Farasan Islands, Saudi Arabia) yielded oocysts of an undescribed coccidian parasite, Eimeria farasanii n. sp. Eleven out of the 24 faecal samples (45.8%) were infected with the parasite. Sporulated oocysts of Eimeria farasanii n. sp., are ellipsoidal, flattened at micropylar end, measured 20.8±1.8x19.5±1.6 μm (19-25x18-23 μm), length/width ratio 1.07±0.05 (1.04-1.15), with smooth, double-layered oocyst wall, the inner yellow, the outer bluish green, with micropyle 3.6 μm but without a micropylar cap. Sporocyst elongate, measured 8.2±1.1x3.2±0.7 μm (7-10x2-5 μm) length/width ratio 2.6±0.5 (2-4). Stieda body present, substieda body absent. Sporocyst residuum present, consists of diffuse, coarse, refractile granules. Sporozoites elongate, measured 6.5±1.2 μm (6-8 μm), each with a small refractile body at wide end. Sporulation time 7-8 days at 25±2°C. In the present investigation Eimeria farasanii n. sp., was described from Farasan gazelle based on the morphological differences with previously described species from the genus Gazella.
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