First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina
Coccidiosis of sheep is an intestinal infection caused by protozoa of the genus Eimeria. An outbreak of the disease in adult sheep from Salta province, northwestern Argentina, was studied to establish its clinical, epidemiological, pathological and etiological aspects. The affected animals were part...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Elsevier
2020
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| Online Access: | http://hdl.handle.net/20.500.12123/7561 https://www.sciencedirect.com/science/article/abs/pii/S2405939020302100 https://doi.org/10.1016/j.vprsr.2020.100429 |
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| author | Olmos, Leandro Hipolito Colque Caro, Luis Adrián Avellaneda Cáceres, Agustín Medina, Diego M. Sandoval, Gabriela V. Aguirre, Daniel Hector Micheloud, Juan Francisco |
| author_browse | Aguirre, Daniel Hector Avellaneda Cáceres, Agustín Colque Caro, Luis Adrián Medina, Diego M. Micheloud, Juan Francisco Olmos, Leandro Hipolito Sandoval, Gabriela V. |
| author_facet | Olmos, Leandro Hipolito Colque Caro, Luis Adrián Avellaneda Cáceres, Agustín Medina, Diego M. Sandoval, Gabriela V. Aguirre, Daniel Hector Micheloud, Juan Francisco |
| author_sort | Olmos, Leandro Hipolito |
| collection | INTA Digital |
| description | Coccidiosis of sheep is an intestinal infection caused by protozoa of the genus Eimeria. An outbreak of the disease in adult sheep from Salta province, northwestern Argentina, was studied to establish its clinical, epidemiological, pathological and etiological aspects. The affected animals were part of a flock of 20 sheep brought from Formosa province about 10 days before. Most sheep (80% incidence) showed hemorrhagic diarrhea, dehydration and loss of body condition; six of them died and two that became permanently recumbent were euthanized. Three necropsied sheep showed mild mesenteric lymphadenomegaly, diffuse proliferative enteritis in the small and large intestines, and mucosal thickening. Histopathological studies exhibited diffuse proliferative enteritis and presence of structures compatible with intracellular coccidia at different stages of development. Parasitological studies (n = 12) resulted in an average of 16,636.6 (± 15,266.8) Eimeria oocysts per gram of feces (range 1680-46,400). Taxonomy of Eimeria species based on analysis of sporulated oocysts derived from 4 fecal samples (n = 100 oocyst per sample) showed, on average, a high prevalence of E. ovinoidalis (61.5%), followed by E. parva (27.2%), and lower proportions of E. crandallis (5.3%), E. ahsata (3.2%) and E. intricata (2.8%). Clinical and pathological findings confirmed the diagnosis of coccidiosis in the affected sheep; parasitological results showed that E. ovinoidalis was the main species responsible for the clinical signs. Clinical coccidiosis is considered unusual in adult sheep, but the present case shows that under favorable environmental and/or management conditions, this infection may be highly deleterious for adult sheep. |
| format | info:ar-repo/semantics/artículo |
| id | INTA7561 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA75612025-09-09T13:30:27Z First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina Olmos, Leandro Hipolito Colque Caro, Luis Adrián Avellaneda Cáceres, Agustín Medina, Diego M. Sandoval, Gabriela V. Aguirre, Daniel Hector Micheloud, Juan Francisco Ovinos Enfermedades de los Animales Coccidiosis Eimeria Identificación Sheep Animal Diseases Identification Eimeria ovinoidalis Región Noroeste, Argentina Coccidiosis of sheep is an intestinal infection caused by protozoa of the genus Eimeria. An outbreak of the disease in adult sheep from Salta province, northwestern Argentina, was studied to establish its clinical, epidemiological, pathological and etiological aspects. The affected animals were part of a flock of 20 sheep brought from Formosa province about 10 days before. Most sheep (80% incidence) showed hemorrhagic diarrhea, dehydration and loss of body condition; six of them died and two that became permanently recumbent were euthanized. Three necropsied sheep showed mild mesenteric lymphadenomegaly, diffuse proliferative enteritis in the small and large intestines, and mucosal thickening. Histopathological studies exhibited diffuse proliferative enteritis and presence of structures compatible with intracellular coccidia at different stages of development. Parasitological studies (n = 12) resulted in an average of 16,636.6 (± 15,266.8) Eimeria oocysts per gram of feces (range 1680-46,400). Taxonomy of Eimeria species based on analysis of sporulated oocysts derived from 4 fecal samples (n = 100 oocyst per sample) showed, on average, a high prevalence of E. ovinoidalis (61.5%), followed by E. parva (27.2%), and lower proportions of E. crandallis (5.3%), E. ahsata (3.2%) and E. intricata (2.8%). Clinical and pathological findings confirmed the diagnosis of coccidiosis in the affected sheep; parasitological results showed that E. ovinoidalis was the main species responsible for the clinical signs. Clinical coccidiosis is considered unusual in adult sheep, but the present case shows that under favorable environmental and/or management conditions, this infection may be highly deleterious for adult sheep. Instituto de Investigación Animal del Chaco Semiárido Fil: Olmos, Leandro Hipólito. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Investigación Animal Chaco Semiarido; Argentina. Universidad Católica de Salta. Facultad de Ciencias Agrarias y Veterinarias; Argentina Fil: Colque Caro, Luis Adrián. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Investigación Animal Chaco Semiarido; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Avellaneda-Cáceres, Agustín. Universidad Católica de Salta. Facultad de Ciencias Agrarias y Veterinarias; Argentina Fil: Medina, Diego M. Universidad Católica de Salta. Facultad de Ciencias Agrarias y Veterinarias; Argentina Fil: Sandoval, Gabriela V. Universidad Católica de Salta. Facultad de Ciencias Agrarias y Veterinarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Aguirre, Daniel Hector. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Investigación Animal del Chaco Semiárido; Argentina Fil: Micheloud, Juan Francisco. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Investigación Animal Chaco Semiarido; Argentina. Universidad Católica de Salta. Facultad de Ciencias Agrarias y Veterinarias; Argentina 2020-07-16T12:36:37Z 2020-07-16T12:36:37Z 2020-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/7561 https://www.sciencedirect.com/science/article/abs/pii/S2405939020302100 2405-9390 https://doi.org/10.1016/j.vprsr.2020.100429 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Veterinary Parasitology: Regional Studies and Reports 21 : 100429 (July 2020) |
| spellingShingle | Ovinos Enfermedades de los Animales Coccidiosis Eimeria Identificación Sheep Animal Diseases Identification Eimeria ovinoidalis Región Noroeste, Argentina Olmos, Leandro Hipolito Colque Caro, Luis Adrián Avellaneda Cáceres, Agustín Medina, Diego M. Sandoval, Gabriela V. Aguirre, Daniel Hector Micheloud, Juan Francisco First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina |
| title | First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina |
| title_full | First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina |
| title_fullStr | First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina |
| title_full_unstemmed | First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina |
| title_short | First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina |
| title_sort | first record of clinical coccidiosis eimeria ovinoidalis in adult sheep from northwestern argentina |
| topic | Ovinos Enfermedades de los Animales Coccidiosis Eimeria Identificación Sheep Animal Diseases Identification Eimeria ovinoidalis Región Noroeste, Argentina |
| url | http://hdl.handle.net/20.500.12123/7561 https://www.sciencedirect.com/science/article/abs/pii/S2405939020302100 https://doi.org/10.1016/j.vprsr.2020.100429 |
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