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Articles by O.B. Mohammed
Total Records ( 3 ) for O.B. Mohammed
  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.
  M.F. Hussein , R.S. Al-jumaah , A.A. Alhaidary , M.A. Alshaikh , A. Gar ElNabi , O.B. Mohammed , A. Sawsan Omer and W.V. Macasero
  Total Platelet count (PLT), Mean Platelet Volume (MPV), Plateletcrit (PCT) and Platelet Distribution Width (PDW) were determined, along with hematological parameters, in blood samples from 8 captive mountain gazelles (Gazella gazella). The mean values of PLT, PCT, MPV and PDW were: 288.75±168.8 (x103 μL-1), 0.20±0.13%, 7.24±0.84 (fl) and 34.84±2.36%, respectively. The corresponding values for parallel red cell variables were 13.48±1.17 (1012 L-1) for Red Blood Cell count (RBC), 52.70±5.45 (fl) for Hematocrit (HCT), 39.00±1.07 for Mean Corpuscular Volume (MCV) and 19.86+0.32% for Red cell Distribution Width (RDW). Correlation analysis revealed highly significant correlations for PCT with PLT (p<0.0001), PCT with HCT (p<0.001) and PDW with MCV (p<0.001). This study is the first record of platelet counts and platelet indices in mountain gazelles.
  S.A. Omer , S.E.I. Adam and O.B. Mohammed
  Ethanolic and ether extracts of Commiphora myrrha were evaluated for their antimicrobial activity against two Gram negative organisms (Escherichia coli and Pseudomonas aeruginosa), two Gram positive organisms (Bacillus subtilis and Staphylococcus albus) and fungi represented by Candida albicans isolated from gazelles held at King Khalid Wildlife Research Centre, Thumamah. The method used in evaluation of the antimicrobial activity was the two-layer agar diffusion method. The ethanolic extract of C. myrrha exhibited antimicrobial activity against the Gram negative organisms investigated together with S. albus. On the other hand, the ether extract showed antimicrobial activity against Gram positive organisms investigated and against Candida albicans, with the antifungal activity being greater. The minimum inhibitory concentration of the ethanolic extract against P. aeruginosa and E. coli was found to be 20 and 40 mg mL-1, respectively. While the minimum inhibitory concentration of the ether extract against both S. albus and C. albicans was found to be 10 and 40 mg mL-1 for B. subtilis, respectively.
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