Spontaneous intoxication of sheep by the pollen beetle Astylus atromaculatus: 4 outbreaks in Uruguay and Argentina

Autores
Matto, Carolina; Garcia, Juan Agustin; Livio, Juan Manuel; Rodriguez, Victor; Gianneechini, Edgardo; Giannitti, Federico; Garcia y Santos, Carmen; Corro, Ana Cecilia; Dutra, Fernando; Uzal, Francisco A.
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Astylus atromaculatus Blanchard is a native beetle of South America that feeds on pollen. During the summer of 2022–2023 in Argentina and Uruguay, an explosive infestation of these insects occurred in pastures in which ruminants were grazing. This was believed to be associated with a severe drought, which had significantly reduced the flowering of crops. Three farms in Uruguay and one in Argentina were visited to examine the flocks and perform autopsies. Affected sheep had watery diarrhea, anorexia, depression, and ruminal atony. The average morbidity, mortality, and case fatality rates were 7.5%, 4.3%, and 68%, respectively. The main gross findings in all animals were in the jejunum; the serosa had multifocal hemorrhages, and the mucosa was necrotic and covered by a pseudomembrane. Microscopically, the mucosa had partial-to complete necrosis of the lamina propria, as well as loss of villus and crypt epithelium with neutrophilic infiltration. Overlying the necrotic mucosa was a pseudomembrane of fibrin, cell debris, desquamated epithelial cells, degenerate neutrophils, and bacteria. Many specimens of A. atromaculatus were in all paddocks in which sheep grazed, as well as in the ruminal content of the autopsied animals.
EEA Balcarce
Fil: Matto, Carolina. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; Uruguay
Fil: García, Juan Agustin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS); Argentina
Fil: Livio, Juan Manuel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce.Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS); Argentina
Fil: Rodriguez, Victor. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; Uruguay
Fil: Gianneechini, Edgardo. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; Uruguay
Fil: Giannitti, Federico. Instituto Nacional de Investigación Agropecuaria (INIA). Plataforma de Investigación en Salud Animal. Estación Experimental La Estanzuela; Uruguay
Fil: Garcia y Santos, Carmen. Universidad de la República. Facultad de Veterinaria. Departamento de Toxicología; Uruguay
Fil: Corro, Ana Cecilia. Universidad de la República. Facultad de Veterinaria. Departamento de Toxicología; Uruguay
Fil: Dutra, Fernando. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; Uruguay
Fil: Dutra, Fernando. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Este; Uruguay
Fil: Uzal, Francisco A. University of California. School of Veterinary Medicine. California Animal Health and Food Safety Laboratory; Estados Unidos
Fuente
Journal of Veterinary Diagnostic Investigation 36 (4) : 573-578 (2024)
Materia
Sheep
Diarrhoea
Ovinos
Meligethes aeneus
Diarrea
Argentina
Uruguay
Intoxicación
Astylus atromaculatus
Pollen Beetle
Nivel de accesibilidad
acceso restringido
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
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spelling Spontaneous intoxication of sheep by the pollen beetle Astylus atromaculatus: 4 outbreaks in Uruguay and ArgentinaMatto, CarolinaGarcia, Juan AgustinLivio, Juan ManuelRodriguez, VictorGianneechini, EdgardoGiannitti, FedericoGarcia y Santos, CarmenCorro, Ana CeciliaDutra, FernandoUzal, Francisco A.SheepDiarrhoeaOvinosMeligethes aeneusDiarreaArgentinaUruguayIntoxicaciónAstylus atromaculatusPollen BeetleAstylus atromaculatus Blanchard is a native beetle of South America that feeds on pollen. During the summer of 2022–2023 in Argentina and Uruguay, an explosive infestation of these insects occurred in pastures in which ruminants were grazing. This was believed to be associated with a severe drought, which had significantly reduced the flowering of crops. Three farms in Uruguay and one in Argentina were visited to examine the flocks and perform autopsies. Affected sheep had watery diarrhea, anorexia, depression, and ruminal atony. The average morbidity, mortality, and case fatality rates were 7.5%, 4.3%, and 68%, respectively. The main gross findings in all animals were in the jejunum; the serosa had multifocal hemorrhages, and the mucosa was necrotic and covered by a pseudomembrane. Microscopically, the mucosa had partial-to complete necrosis of the lamina propria, as well as loss of villus and crypt epithelium with neutrophilic infiltration. Overlying the necrotic mucosa was a pseudomembrane of fibrin, cell debris, desquamated epithelial cells, degenerate neutrophils, and bacteria. Many specimens of A. atromaculatus were in all paddocks in which sheep grazed, as well as in the ruminal content of the autopsied animals.EEA BalcarceFil: Matto, Carolina. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; UruguayFil: García, Juan Agustin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS); ArgentinaFil: Livio, Juan Manuel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce.Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS); ArgentinaFil: Rodriguez, Victor. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; UruguayFil: Gianneechini, Edgardo. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; UruguayFil: Giannitti, Federico. Instituto Nacional de Investigación Agropecuaria (INIA). Plataforma de Investigación en Salud Animal. Estación Experimental La Estanzuela; UruguayFil: Garcia y Santos, Carmen. Universidad de la República. Facultad de Veterinaria. Departamento de Toxicología; UruguayFil: Corro, Ana Cecilia. Universidad de la República. Facultad de Veterinaria. Departamento de Toxicología; UruguayFil: Dutra, Fernando. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; UruguayFil: Dutra, Fernando. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Este; UruguayFil: Uzal, Francisco A. University of California. School of Veterinary Medicine. California Animal Health and Food Safety Laboratory; Estados UnidosSage Publications2026-08-19T14:11:26Z2026-08-19T14:11:26Z2024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/27471https://journals.sagepub.com/doi/10.1177/104063872412491801943-4936https://doi.org/10.1177/10406387241249180Journal of Veterinary Diagnostic Investigation 36 (4) : 573-578 (2024)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2026-09-24T11:43:43Zoai:localhost:20.500.12123/27471instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2026-09-24 11:43:44.102INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Spontaneous intoxication of sheep by the pollen beetle Astylus atromaculatus: 4 outbreaks in Uruguay and Argentina
title Spontaneous intoxication of sheep by the pollen beetle Astylus atromaculatus: 4 outbreaks in Uruguay and Argentina
spellingShingle Spontaneous intoxication of sheep by the pollen beetle Astylus atromaculatus: 4 outbreaks in Uruguay and Argentina
Matto, Carolina
Sheep
Diarrhoea
Ovinos
Meligethes aeneus
Diarrea
Argentina
Uruguay
Intoxicación
Astylus atromaculatus
Pollen Beetle
title_short Spontaneous intoxication of sheep by the pollen beetle Astylus atromaculatus: 4 outbreaks in Uruguay and Argentina
title_full Spontaneous intoxication of sheep by the pollen beetle Astylus atromaculatus: 4 outbreaks in Uruguay and Argentina
title_fullStr Spontaneous intoxication of sheep by the pollen beetle Astylus atromaculatus: 4 outbreaks in Uruguay and Argentina
title_full_unstemmed Spontaneous intoxication of sheep by the pollen beetle Astylus atromaculatus: 4 outbreaks in Uruguay and Argentina
title_sort Spontaneous intoxication of sheep by the pollen beetle Astylus atromaculatus: 4 outbreaks in Uruguay and Argentina
dc.creator.none.fl_str_mv Matto, Carolina
Garcia, Juan Agustin
Livio, Juan Manuel
Rodriguez, Victor
Gianneechini, Edgardo
Giannitti, Federico
Garcia y Santos, Carmen
Corro, Ana Cecilia
Dutra, Fernando
Uzal, Francisco A.
author Matto, Carolina
author_facet Matto, Carolina
Garcia, Juan Agustin
Livio, Juan Manuel
Rodriguez, Victor
Gianneechini, Edgardo
Giannitti, Federico
Garcia y Santos, Carmen
Corro, Ana Cecilia
Dutra, Fernando
Uzal, Francisco A.
author_role author
author2 Garcia, Juan Agustin
Livio, Juan Manuel
Rodriguez, Victor
Gianneechini, Edgardo
Giannitti, Federico
Garcia y Santos, Carmen
Corro, Ana Cecilia
Dutra, Fernando
Uzal, Francisco A.
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Sheep
Diarrhoea
Ovinos
Meligethes aeneus
Diarrea
Argentina
Uruguay
Intoxicación
Astylus atromaculatus
Pollen Beetle
topic Sheep
Diarrhoea
Ovinos
Meligethes aeneus
Diarrea
Argentina
Uruguay
Intoxicación
Astylus atromaculatus
Pollen Beetle
dc.description.none.fl_txt_mv Astylus atromaculatus Blanchard is a native beetle of South America that feeds on pollen. During the summer of 2022–2023 in Argentina and Uruguay, an explosive infestation of these insects occurred in pastures in which ruminants were grazing. This was believed to be associated with a severe drought, which had significantly reduced the flowering of crops. Three farms in Uruguay and one in Argentina were visited to examine the flocks and perform autopsies. Affected sheep had watery diarrhea, anorexia, depression, and ruminal atony. The average morbidity, mortality, and case fatality rates were 7.5%, 4.3%, and 68%, respectively. The main gross findings in all animals were in the jejunum; the serosa had multifocal hemorrhages, and the mucosa was necrotic and covered by a pseudomembrane. Microscopically, the mucosa had partial-to complete necrosis of the lamina propria, as well as loss of villus and crypt epithelium with neutrophilic infiltration. Overlying the necrotic mucosa was a pseudomembrane of fibrin, cell debris, desquamated epithelial cells, degenerate neutrophils, and bacteria. Many specimens of A. atromaculatus were in all paddocks in which sheep grazed, as well as in the ruminal content of the autopsied animals.
EEA Balcarce
Fil: Matto, Carolina. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; Uruguay
Fil: García, Juan Agustin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce. Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS); Argentina
Fil: Livio, Juan Manuel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce.Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS); Argentina
Fil: Rodriguez, Victor. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; Uruguay
Fil: Gianneechini, Edgardo. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; Uruguay
Fil: Giannitti, Federico. Instituto Nacional de Investigación Agropecuaria (INIA). Plataforma de Investigación en Salud Animal. Estación Experimental La Estanzuela; Uruguay
Fil: Garcia y Santos, Carmen. Universidad de la República. Facultad de Veterinaria. Departamento de Toxicología; Uruguay
Fil: Corro, Ana Cecilia. Universidad de la República. Facultad de Veterinaria. Departamento de Toxicología; Uruguay
Fil: Dutra, Fernando. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Noroeste; Uruguay
Fil: Dutra, Fernando. Ministerio de Ganadería, Agricultura y Pesca. Laboratorio Regional Este; Uruguay
Fil: Uzal, Francisco A. University of California. School of Veterinary Medicine. California Animal Health and Food Safety Laboratory; Estados Unidos
description Astylus atromaculatus Blanchard is a native beetle of South America that feeds on pollen. During the summer of 2022–2023 in Argentina and Uruguay, an explosive infestation of these insects occurred in pastures in which ruminants were grazing. This was believed to be associated with a severe drought, which had significantly reduced the flowering of crops. Three farms in Uruguay and one in Argentina were visited to examine the flocks and perform autopsies. Affected sheep had watery diarrhea, anorexia, depression, and ruminal atony. The average morbidity, mortality, and case fatality rates were 7.5%, 4.3%, and 68%, respectively. The main gross findings in all animals were in the jejunum; the serosa had multifocal hemorrhages, and the mucosa was necrotic and covered by a pseudomembrane. Microscopically, the mucosa had partial-to complete necrosis of the lamina propria, as well as loss of villus and crypt epithelium with neutrophilic infiltration. Overlying the necrotic mucosa was a pseudomembrane of fibrin, cell debris, desquamated epithelial cells, degenerate neutrophils, and bacteria. Many specimens of A. atromaculatus were in all paddocks in which sheep grazed, as well as in the ruminal content of the autopsied animals.
publishDate 2024
dc.date.none.fl_str_mv 2024
2026-08-19T14:11:26Z
2026-08-19T14:11:26Z
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/20.500.12123/27471
https://journals.sagepub.com/doi/10.1177/10406387241249180
1943-4936
https://doi.org/10.1177/10406387241249180
url http://hdl.handle.net/20.500.12123/27471
https://journals.sagepub.com/doi/10.1177/10406387241249180
https://doi.org/10.1177/10406387241249180
identifier_str_mv 1943-4936
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv restrictedAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Sage Publications
publisher.none.fl_str_mv Sage Publications
dc.source.none.fl_str_mv Journal of Veterinary Diagnostic Investigation 36 (4) : 573-578 (2024)
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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