First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina

Autores
Olmos, Leandro Hipolito; Colque Caro, Luis Adrián; Avellaneda Cáceres, Agustín; Medina, Diego M.; Sandoval, Gabriela V.; Aguirre, Daniel Hector; Micheloud, Juan Francisco
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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
Fuente
Veterinary Parasitology: Regional Studies and Reports 21 : 100429 (July 2020)
Materia
Ovinos
Enfermedades de los Animales
Coccidiosis
Eimeria
Identificación
Sheep
Animal Diseases
Identification
Eimeria ovinoidalis
Región Noroeste, Argentina
Nivel de accesibilidad
acceso restringido
Condiciones de uso
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/7561
Acceder
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oai_identifier_str oai:localhost:20.500.12123/7561
network_acronym_str INTADig
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network_name_str INTA Digital (INTA)
spelling First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern ArgentinaOlmos, Leandro HipolitoColque Caro, Luis AdriánAvellaneda Cáceres, AgustínMedina, Diego M.Sandoval, Gabriela V.Aguirre, Daniel HectorMicheloud, Juan FranciscoOvinosEnfermedades de los AnimalesCoccidiosisEimeriaIdentificaciónSheepAnimal DiseasesIdentificationEimeria ovinoidalisRegión Noroeste, ArgentinaCoccidiosis 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 SemiáridoFil: 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; ArgentinaFil: Colque Caro, Luis Adrián. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Investigación Animal Chaco Semiarido; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Avellaneda-Cáceres, Agustín. Universidad Católica de Salta. Facultad de Ciencias Agrarias y Veterinarias; ArgentinaFil: Medina, Diego M. Universidad Católica de Salta. Facultad de Ciencias Agrarias y Veterinarias; ArgentinaFil: Sandoval, Gabriela V. Universidad Católica de Salta. Facultad de Ciencias Agrarias y Veterinarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Aguirre, Daniel Hector. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Investigación Animal del Chaco Semiárido; ArgentinaFil: 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; ArgentinaElsevier2020-07-16T12:36:37Z2020-07-16T12:36:37Z2020-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/7561https://www.sciencedirect.com/science/article/abs/pii/S24059390203021002405-9390https://doi.org/10.1016/j.vprsr.2020.100429Veterinary Parasitology: Regional Studies and Reports 21 : 100429 (July 2020)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccess2025-09-29T13:44:58Zoai:localhost:20.500.12123/7561instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:44:59.281INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv 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
spellingShingle First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina
Olmos, Leandro Hipolito
Ovinos
Enfermedades de los Animales
Coccidiosis
Eimeria
Identificación
Sheep
Animal Diseases
Identification
Eimeria ovinoidalis
Región Noroeste, Argentina
title_short 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_sort First record of clinical coccidiosis (Eimeria ovinoidalis) in adult sheep from northwestern Argentina
dc.creator.none.fl_str_mv Olmos, Leandro Hipolito
Colque Caro, Luis Adrián
Avellaneda Cáceres, Agustín
Medina, Diego M.
Sandoval, Gabriela V.
Aguirre, Daniel Hector
Micheloud, Juan Francisco
author Olmos, Leandro Hipolito
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_role author
author2 Colque Caro, Luis Adrián
Avellaneda Cáceres, Agustín
Medina, Diego M.
Sandoval, Gabriela V.
Aguirre, Daniel Hector
Micheloud, Juan Francisco
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ovinos
Enfermedades de los Animales
Coccidiosis
Eimeria
Identificación
Sheep
Animal Diseases
Identification
Eimeria ovinoidalis
Región Noroeste, Argentina
topic Ovinos
Enfermedades de los Animales
Coccidiosis
Eimeria
Identificación
Sheep
Animal Diseases
Identification
Eimeria ovinoidalis
Región Noroeste, Argentina
dc.description.none.fl_txt_mv 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
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.
publishDate 2020
dc.date.none.fl_str_mv 2020-07-16T12:36:37Z
2020-07-16T12:36:37Z
2020-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 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
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
identifier_str_mv 2405-9390
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
eu_rights_str_mv restrictedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Veterinary Parasitology: Regional Studies and Reports 21 : 100429 (July 2020)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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