Redescription of Oocysts of the Bovine Coccidia Eimeria bukidnonensis Tubangui 1931 and E. wyomingensis Huizinga and Winger 1942

Courtney, Charles H.; Ernst, John V.; Benz, Gerald W.

doi:10.2307/3279145

Cited by 9 publications

(4 citation statements)

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“…They found that 55.8% of animals up to 18 months of age and only 30.8% of those over 31 months of age were positive. These data support the hypothesis that young animals have more susceptible to infection by this parasite (COURTNEY; ERNST; BENZ, 1976). Some studies have reported the presence of Eimeria oocysts in 70% (MATJILA; PENZHORN, 2002) and 100% of samples from young animals (SAMSON-HIMMELSTJERNA et al, 2006).…”

Section: Discussionsupporting

confidence: 76%

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Frequency of species of the Genus Eimeria in naturally infected cattle in Southern Bahia, Northeast Brazil

Almeida

Magalhães

Neta

et al. 2011

Rev. Bras. Parasitol. Vet.

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The aim of this study was to determine the presence of species of the genus Eimeria species in naturally infected bovines in Southern Bahia, Northeast Brazil. The study population comprised 117 Zebu crossbred cattle that belonged to 10 dairy herds with extensive or semi-extensive production systems. The modified Gordon and Whitlock technique was used to determine positive samples and number of oocysts per gram of feces. Statistical analyses were performed using the chi-square test with Yates correction and a 95% confidence interval. Thirty-nine cattle (33.33%) were positive, and ten different species were identified in infected animals: E. bovis (24.79%); E. canadensis (8.55%); E. zuernii (6.83%); E. ellipsoidalis (5.99%); E. cylindrica (3.42%); E. auburnensis (3.42%); E. brasiliensis (2.56%); E. bukidnonensis (1.71%); E. alabamensis (0.85%), and E. subspherica (0.85%). Higher parasitism was observed in animals up to one year of age (p = 0.005), but no animal presented clinical signs of the disease. As the presence of clinical eimeriosis was not evidenced and all animals were Zebu crossbred cattle from extensive or semi-extensive production systems, further studies should be conducted to investigate the effects of these factors on disease development.Keywords: Coccidian, dairy cattle, age group, frequency. ResumoO objetivo deste estudo foi determinar a presença de espécies do gênero Eimeria em bovinos naturalmente infectados, na região Sudeste da Bahia, Nordeste do Brasil. A população do estudo incluiu 117 bovinos mestiços de raças Zebuínas que pertenciam a 10 fazendas leiteiras com sistemas de produção extensivo ou semiextensivo. A técnica de Gordon e Whitlock modificada foi utilizada para determinar as amostras positivas e o número de oocistos por grama de fezes. A análise estatística foi realizada utilizando o teste do qui-quadrado com correção de Yates e intervalo de confiança de 95%. Trinta e nove animais (33,33%) foram positivos, e dez diferentes espécies foram identificadas nos animais infectados: E. bovis (24,79%), E. canadensis (8,55%), E. zuernii (6,83%), E. ellipsoidalis (5,99% ), E. cylindrica (3,42%), E. auburnensis (3,42%), E. brasiliensis (2,56%), E. bukidnonensis (1,71%), E. alabamensis (0,85%) e E. subspherica (0,85%). Maior parasitismo foi observado em animais com até um ano de idade (p = 0,005), mas nenhum animal apresentou sinais clínicos que fossem compatíveis com a parasitose. Como não foi observado presença de eimeriose clínica e como todos os animais eram mestiços zebuínos e pertencentes ao sistema de criação extensivo ou semiextensivo, novos estudos devem ser conduzidos para comprovar a influência desses fatores no surgimento da doença.Palavras-chave: Coccídio, gado leiteiro, faixa etária, frequência.

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Section: Discussionsupporting

confidence: 76%

“…Adult animals are usually asymptomatic carriers that often serve as a source of infection for juvenile animals, which are more susceptible to parasitosis (COURTNEY; ERNST; BENZ, 1976;CHIBUNDA et al, 1997;MATJILA;PENZHORN, 2002;NAJDROWSKI, 2005).…”

Section: Introductionmentioning

confidence: 99%

Frequency of species of the Genus Eimeria in naturally infected cattle in Southern Bahia, Northeast Brazil

Almeida

Magalhães

Neta

et al. 2011

Rev. Bras. Parasitol. Vet.

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“…M is present (about 3–5 in diameter) and PG, OR, and SR are absent. Oocyst wall of 2 layers, 3.5 thick, and dark brown [ 35 ]. In phylogenetic relationships of two species, the pairwise genetic distance of E. davidianusi and E. bukidnonensis at the 18S rRNA, ITS-1 and COI locus is 97.69, 97.50 and 90.29%, respectively, and phylogenetic analysis revealed that E. davidianusi was closely to E. bukidnonensis .…”

Section: Discussionmentioning

confidence: 99%

“…Where no sporocysts could be manipulated into lateral position within the oocyst, sporocyst length measurement was not taken. The oocysts were compared with some published coccidia of Artiodactyla to observe the morphological similarities and differences [ 24 , 35 , 37 – 42 ].…”

Section: Methodsmentioning

confidence: 99%

A new Eimeria coccidian species (Apicomplexa: Eimeriidae) from Père David’s deer (Elaphurus davidianus Milne-Edwards, 1866) in Dafeng Milu National Nature Reserve in Jiangsu Province, eastern China

et al. 2022

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Background Eimeria coccidiosis is a significant intestinal parasitic disease, which can lead to weight loss, disease and even death of many animals. At present, there is no information about the prevalence of Eimeria among the world’s endangered species of Père David’s deer (Elaphurus davidianus). Therefore, the purpose of this study is to identify an unknown Eimeria genus in the Père David’s deer in Dafeng Milu National Nature Reserve, China. Results A new Eimeria species is described from Père David’s deer. Sporulated oocysts (n = 54) are pyriform, with a rough, yellowish brown, 2-layered oocyst wall (2.5 μm thick). A numerous small granules are dispersed randomly on the wall. Oocysts measured 41.2 (39.2–42.8) μm × 29.5 (27.9–30.5) μm, oocyst length/width (L/W) ratio, 1.4. Oocyst residuum, a polar granule and a polar cap are absent. The micropyle (3.5 μm wide) is present. Sporocysts are spindle shaped, 18.2 (16.5–20.0) μm × 10.5 (9.8–11.9) μm, sporocyst L/W ratio, 1.7 (1.5–1.9). A thin convex Stieda body is present and the sporocyst residuum is composed of numerous small granules less than 2.0 μm in diameter dispersed randomly. Each sporocyst contained 2 comma-shaped sporozoites in head-to-tail arrangement. A nucleus is located immediately anterior to the posterior, strong refractive and subspherical refractile body (~ 8 μm). Molecular analysis was conducted at the 18S, ITS-1 and COI loci. Conclusion Based on the morphological and molecular data, this isolate is a new species of coccidian parasite, which is named Eimeria davidianusi after its host, the Père David’s deer (Elaphurus davidianus).

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Eimeria

Bangoura¹,

Daugschies²

2017

Parasitic Protozoa of Farm Animals and Pets

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Redescription of Oocysts of the Bovine Coccidia Eimeria bukidnonensis Tubangui 1931 and E. wyomingensis Huizinga and Winger 1942

Cited by 9 publications

References 5 publications

Frequency of species of the Genus Eimeria in naturally infected cattle in Southern Bahia, Northeast Brazil

Frequency of species of the Genus Eimeria in naturally infected cattle in Southern Bahia, Northeast Brazil

A new Eimeria coccidian species (Apicomplexa: Eimeriidae) from Père David’s deer (Elaphurus davidianus Milne-Edwards, 1866) in Dafeng Milu National Nature Reserve in Jiangsu Province, eastern China

Eimeria

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