Fatal theileriosis in eland (Taurotragus oryx): pathology of natural and experimental cases

Grootenhuis, J.G.; Morrison, W. Ivan; Karstad, L.; Sayer, P. D.; Young, A. S.; Murray, M.; Haller, R de

doi:10.1016/s0034-5288(18)32667-5

Cited by 21 publications

(63 citation statements)

References 11 publications

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“…taurotragi, which is considered to be primarily a parasite of eland (Grootenhuis et al, 1980), was not present in any of the sampled buffalo, suggesting that buffalo are resistant to this parasite. Eland are present in all the sampled parks except QENP and, in a recent study of animals from LMNP (Oura et al, 2010), 100% of the eland were infected with T. taurotragi.…”

Section: Discussionmentioning

confidence: 94%

Haemoparasite prevalence and Theileria parva strain diversity in Cape buffalo (Syncerus caffer) in Uganda

Oura

Tait

Asiimwe

et al. 2011

Veterinary Parasitology

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Section: Discussionmentioning

confidence: 94%

Haemoparasite prevalence and Theileria parva strain diversity in Cape buffalo (Syncerus caffer) in Uganda

Oura

Tait

Asiimwe

et al. 2011

Veterinary Parasitology

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“…taurotragi is known to be a parasite of eland (Grootenhuis et al 1980), and there are large populations of eland present in LMNP. Therefore, it is unsurprising that calves grazing inside the park had a higher prevalence of T. taurotragi than calves grazing outside the park.…”

Section: Discussionmentioning

confidence: 99%

Theileria parva genetic diversity and haemoparasite prevalence in cattle and wildlife in and around Lake Mburo National Park in Uganda

et al. 2010

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Wildlife, especially Cape buffalo (Syncerus caffer), are thought to act as a reservoir for many of the important tick-borne pathogens of cattle. In this study, we have determined the prevalence of the most significant tick-borne haemoparasites in wildlife (buffalo, impala, eland and bushbuck) as well as in cattle grazing inside and neighbouring Lake Mburo National Park (LMNP) in Uganda. A high percentage of buffalo were carriers of Theileria parva, Theileria mutans, Theileria velifera, Theileria buffeli and Theileria sp. (buffalo) as well as Anaplasma marginale and Anaplasma centrale. The majority of impala sampled were carriers of A. centrale, and all were carriers of an unidentified Babesia/Theileria species. The eland and bushbuck sampled were all carriers of Theileria taurotragi and Theileria buffeli, and the majority were carriers of T. mutans. The bushbuck sampled were also carriers for Erhlichia bovis. There were some differences in the prevalence of haemoparasites between the calves sampled inside and neighbouring LMNP. In order to address the question of whether there is evidence for interbreeding between buffalo-associated and cattle-associated T. parva populations, multi-locus genotypes (MLGs) of T. parva (based on micro-satellite markers) from buffalo and from calves grazing inside and outside LMNP were compared, and the results revealed that buffalo and cattle gene pools were distinct, showing no evidence for transmission of buffalo-derived T. parva genotypes to the cattle population.

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“…Prominent lung edema was another frequent but inconsistent 54 observation in diverse species (Fig. 9).…”

Section: Macroscopic Pathologymentioning

confidence: 91%

The Pathology of Pathogenic Theileriosis in African Wild Artiodactyls

et al. 2019

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The published literature on schizont-“transforming,” or pathogenic theileriosis, in African wild artiodactyls is dated and based on limited information. Here the authors review the taxonomy, diagnosis, epidemiology, hematology, pathology, and aspects of control in various species. Molecular studies based on 18S and 16S rRNA gene sequences have shown that African wild artiodactyls are commonly infected with diverse Theileria spp., as well as nontheilerial hemoprotozoa and rickettsia-like bacteria, and coinfections with pathogenic and nonpathogenic Theileria species are often recorded. Although theileriosis is still confusingly referred to as cytauxzoonosis in many species, the validity of a separate Cytauxzoon genus in artiodactyls is debated. The epidemiology of theileriosis is complex; the likelihood of fatal disease depends on the interplay of parasite, vertebrate host, tick vector, and environmental factors. Roan calves ( Hippotragus equinus) and stressed animals of all host species are more susceptible to fatal theileriosis. Even though regenerative anemia is common, peripheral blood piroplasm parasitemia does not correlate with disease severity. Other than anemia, common macroscopic lesions include icterus, hemorrhages (mucosal, serosal, and tissue), fluid effusions into body cavities, lung edema, and variably sized raised cream-colored foci of leukocyte infiltration in multiple organs. Histopathologic findings include vasocentric hyperproliferation and lysis of atypical leukocytes with associated intracellular schizonts, parenchymal necrosis, hemorrhage, thromboembolism, and edema. Immunophenotyping is required to establish the identity of the schizont-transformed leukocytes in wild ungulates. Throughout the review, we propose avenues for future research by comparing existing knowledge on selected aspects of theileriosis in domestic livestock with that in African wild artiodactyls.

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Fatal theileriosis in eland (Taurotragus oryx): pathology of natural and experimental cases

Cited by 21 publications

References 11 publications

Haemoparasite prevalence and Theileria parva strain diversity in Cape buffalo (Syncerus caffer) in Uganda

Haemoparasite prevalence and Theileria parva strain diversity in Cape buffalo (Syncerus caffer) in Uganda

Theileria parva genetic diversity and haemoparasite prevalence in cattle and wildlife in and around Lake Mburo National Park in Uganda

The Pathology of Pathogenic Theileriosis in African Wild Artiodactyls

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