R Watermeyer

University of Pretoria, Pretoria, Gauteng, South Africa

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Publications (6)4.05 Total impact

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    ABSTRACT: Helminths of mountain reedbuck (Redunca fulvorufula fulvorufula) and gray rhebok (Pelea capreolus) were investigated in South Africa between June 1999 and February 2002. Forty-one mountain reedbuck were culled at Sterkfontein Dam Nature Reserve over 8 different periods, and 25 mountain reedbuck were culled at Tussen die Riviere Nature Reserve over 3 different periods. A total of 17 kinds of helminths were found at the 2 sites, including 15 nematodes, 1 trematode, and 1 cestode. At Sterkfontein, the most prevalent and abundant species were Cooperia yoshidai, Longistrongylus schrenki, and Haemonchus contortus, with the latter 2 being more abundant during November/December than at other times of the year, probably because infective larvae increased on pasture at that time. No statistical differences were found in parasite loads between male and female mountain reedbuck. No correlation was found between fecal egg counts and adult worm counts or between parasite counts and body condition. At Tussen die Riviere, helminths in mountain reedbuck were less prevalent and abundant than at Sterkfontein. The most important species were Nematodirus spathiger, Trichostrongylus falculatus, and Cooperia rotundispiculum. Four gray rhebok died of natural causes at Sterkfontein, from which 5 kinds of helminths were recovered, including C. yoshidai and Paracooperioides peleae.
    Journal of Parasitology 09/2005; 91(4):863-70. · 1.32 Impact Factor
  • R Watermeyer, J Boomker, J F Putterill
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    ABSTRACT: Mönnig (1933) described Setaria thwaitei from a sable antelope, Hippotragus niger, the type host, as well as from roan antelope, Hippotragus equinus, and waterbuck, Kobus ellipsiprymnus. Yeh (1959) considered Setaria thwaitei to be synonym of Setaria hornbyi. Material collected from roan antelopes, sable antelopes and gemsbuck, Oryx gazella, from several localities in the north and south of South Africa, together with Mönnig's (1933) material, were re-examined. Measurements of the adult worms obtained in this study were compared with those in the original description of the species. Scanning electron microscopy of the anterior and posterior regions of the female worms confirmed S. thwaitei as a valid species.
    The Onderstepoort journal of veterinary research 07/2004; 71(2):107-11. · 0.55 Impact Factor
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    R Watermeyer, J Boomker, J F Putteril
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    ABSTRACT: Setaria scalprum (Von Linstow, 1908) and Setaria saegeri (Le Van Hoa, 1961) are closely related filarid species that occur in the smaller antelope of Africa. Material previously collected from common dulker, Sylvicapra grimmia, steenbok, Raphicerus campestris and grysbok, Raphicerus melanotis, from several localities in the northern and eastern regions of South Africa was re-examined and measurements of adult worms were compared with those given in the original descriptions of the species. Scanning electron microscopy of the anterior and posterior regions of the female worms confirmed the validity of the two species. Differences in the postdeirid, ventral transverse bands and bosses on the cuticle of the male specimens were also observed. Setaria saegeri in common duiker and grysbok is a new parasite record for these hosts.
    The Onderstepoort journal of veterinary research 04/2003; 70(1):7-13. · 0.55 Impact Factor
  • R Watermeyer, J Boomker, J F Putterill
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    ABSTRACT: Setaria africana (Yeh, 1959) is represented by two subspecies, Setaria africana africana Troncy, Graber & Thal, 1976 from giant eland (Taurotragus derbianus) from the Central African Republic and Cameroon and Setaria africana farchai Troncy, Graber & Thal, 1976 from bushbuck (Tragelaphus scriptus), also from the Central African Republic. Material collected from nyala (Tragelaphus angasii), bushbuck and kudu (Tragelaphus strepsiceros) from several localities in the eastern region of South Africa was re-examined. Measurements of adult worms confirmed the differences between the two subspecies and scanning electron microscopy showed that the deirids of S. africana africana are single whereas those of S. africana farchaiare double. Setaria africana farchaiis recorded for the first time in South Africa.
    The Onderstepoort journal of veterinary research 12/2000; 67(4):229-34. · 0.55 Impact Factor
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    J Boomker, I G Horak, R Watermeyer, D G Booyse
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    ABSTRACT: The numbers and species of helminths recovered from one black wildebeest, Connochaetes gnou, three eland, Taurotragus oryx, 18 mountain reedbuck, Redunca fulvorufula, one red hartebeest, AIcelaphus buselaphus and two springbok, Antidorcas marsupialis, in the Mountain Zebra National Park, Eastern Cape Province; two black wildebeest, two grey rhebuck, Pelea capreolus, two mountain reedbuck and four springbok in the Karoo National Park, Western Cape Province; two bontebok, Damaliscus pygargus dorcas, two eland, two gemsbok, Oryx gazella and two springbok in the West Coast National Park, Western Cape Province; and a single springbok on a farm near Bredasdorp, Western Cape Province, are recorded. Nematodes belonging to a total of 12 genera and 20 species were identified. A single cestode was also recovered. Sixteen new host associations are recorded for the nematodes and one for the cestode Moniezia benedeni. Nematodirus spathiger had the widest host spectrum and with the exception of black wildebeest, was collected from all the host species examined.
    The Onderstepoort journal of veterinary research 04/2000; 67(1):31-41. · 0.55 Impact Factor
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    ABSTRACT: The helminthis of 58 nyalas (Tragelaphus angasil) culled in the Mkuzi Game Reserve, KwaZulu-Natal, during March 1991, and six culled during March 1994, were collected, identified and counted. Of these, an as yet undescribed Camelostrongylus sp., Cooperia hungl. an Onchocerca sp., Strongyloides papillosus and Moniezia benedeni are new parasite records. The individual nematode burdens of the antelope examined during March 1991 varied from one to 2327, and the total mean adult gastro-intestinal-nematode burden was 586. Those examined during March 1994 had burdens that varied from 322 to 1778, with a mean of 854. The two Camelostrongylus spp. were the most prevalent nematodes in the nyalas culled during 1991, while the trematode Cotylophoron jacksoni was most prevalent in those culled during 1994. The most numerous nematode in nyala calves during 1991 was a Cooperia rotundispiculum race, while the two Camelstrongylus 5pp. were most numerous in the adult and sub-adult nyalas from both surveys. No clear trends between rainfall and nematode burdens were evident, or was there any correlation between faecal nematode egg counts and nematode burdens. Contrary to what was observed in an earlier survey, female nyalas had larger nematode burdens than the males.
    The Onderstepoort journal of veterinary research 01/1997; 63(4):265-71. · 0.55 Impact Factor