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      History and development of research on wildlife parasites in southern Africa, with emphasis on terrestrial mammals, especially ungulates

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          Highlights

          • The history of wildlife parasitology in South Africa, and to some extent southern Africa, is reviewed.

          • A brief overview of the early years, starting in the 1890s, is included.

          • Systematic attempts to study the parasite fauna of each game species since 1970s.

          • The main findings on protozoan, arthropod and helminth parasites are presented.

          Abstract

          The history of wildlife parasitology in South Africa, and to some extent southern Africa, is reviewed, giving a brief overview of the early years and following its development from the founding of the Onderstepoort Veterinary Institute in 1908 until the turn of the century. An emphasis is placed on game species. The main findings on protozoan parasites, including those of carnivores, are presented, starting in the 1890s and leading up to the first decade of the 21st century. Important developments with regard to the studies of arthropod and helminth parasites took place during a period of three decades, starting from the 1970s. Because of the sheer volume of work done by parasitologists during this time, this particular part of the overview concentrates on South African authors or authors working in South Africa at the time, and is limited to hosts that are members of the order Perissodactyla and the superorder Cetartiodactyla.

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          Most cited references248

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          Babesia bicornis sp. nov. and Theileria bicornis sp. nov.: tick-borne parasites associated with mortality in the black rhinoceros (Diceros bicornis).

          A novel Babesia species, designated Babesia bicornis sp. nov., was identified in three black rhinoceroses (Diceros bicornis) that died in wildlife areas in Tanzania and South Africa. Screening of black rhinoceroses in South Africa revealed, in addition to B. bicornis, a second parasite, designated Theileria bicornis sp. nov.
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            Molecular characterization of Theileria species associated with mortality in four species of African antelopes.

            Pathogen DNA was isolated from roan antelope (Hippotragus equinus), sable antelope (Hippotragus niger), greater kudu (Tragelaphus strepsiceros), and common gray duiker (Sylvicapra grimmia) in South Africa whose deaths were attributed to either theileriosis or cytauxzoonosis. We developed Theileria species-specific probes used in combination with reverse line blot hybridization assays and identified three different species of Theileria in four African antelope species. The close phylogenetic relationship between members of the genera Theileria and Cytauxzoon, similarities in the morphologies of developmental stages, and confusion in the literature regarding theileriosis or cytauxzoonosis are discussed.
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              Identification of a novel Babesia sp. from a sable antelope (Hippotragus niger Harris, 1838).

              Babesiosis in a sable antelope (Hippotragus niger Harris, 1838) was first reported in 1930; the parasite was named Babesia irvinesmithi. Recently, specimens from an adult sable that presented with a sudden onset of disease and that subsequently died during immobilization were submitted for molecular characterization. Microscopic examination of thin blood smears revealed the presence of small piroplasms. DNA was extracted from blood samples; the V4 variable region of the 18S rRNA gene was amplified and analyzed using the reverse line blot (RLB) assay. Amplicons did not hybridize with any of the Babesia or Theileria species-specific probes present on the blot and hybridized only with a Babesia or Theileria genus-specific probe, suggesting the presence of a novel species. The full-length 18S rRNA gene sequence was obtained and aligned with published sequences of related genera, and phylogenetic trees were constructed. Sequence similarity analyses indicated that a Babesia species, designated Babesia sp. (sable), was present. The sequence showed its highest similarity to B. orientalis and to an unnamed Babesia species previously detected in bovine samples. The latter was later established to be Babesia occultans. A Babesia sp. (sable)-specific RLB oligonucleotide probe was designed and used to screen 200 South African sable samples, but so far, no other sample has been found to be positive for the presence of Babesia sp. (sable) DNA. In summary, we identified a novel piroplasm parasite from a sable antelope that died from an unknown illness. While the parasite was observed in blood smears, there is no direct evidence that it was the cause of death.
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                Author and article information

                Contributors
                Journal
                Int J Parasitol Parasites Wildl
                Int J Parasitol Parasites Wildl
                International Journal for Parasitology: Parasites and Wildlife
                Elsevier
                2213-2244
                24 December 2014
                April 2015
                24 December 2014
                : 4
                : 1
                : 50-70
                Affiliations
                [a ]Parasites, Vectors and Vector-borne Diseases, ARC-Onderstepoort Veterinary Institute, PBag X05, Onderstepoort 0110, South Africa
                [b ]Department of Veterinary Tropical Diseases, University of Pretoria, PBag X04, Onderstpoort 0110, South Africa
                [c ]Research Associate, National Zoological Gardens, Pretoria, South Africa
                Author notes
                [* ]Corresponding author. Parasites, Vectors and Vector-borne Diseases, ARC-Onderstepoort Veterinary Institute, PBag X05, Onderstepoort 0110, South Africa. Tel.: +27 12 529 9215. junkerk@ 123456arc.agric.za
                Article
                S2213-2244(14)00034-0
                10.1016/j.ijppaw.2014.12.003
                4356741
                25830101
                c0f049a6-905b-4041-9018-843df5f1927e
                © 2014 The Authors

                This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

                History
                : 29 October 2014
                : 9 December 2014
                : 10 December 2014
                Categories
                Article

                wildlife parasites,game species,ungulates,history,south africa

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