Epidemiology and effects of gastrointestional nematode infection on milk productions of dairy ewes

Autores
Suarez, Victor Humberto; Cristel, Silvina Lujan; Busetti, Margarita Rosa
Año de publicación
2009
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
66 Pampinta breed ewes were studied during milking to evaluate the infection and the effect of gastrointestinal nematode on milk production sheep system. Naturally infected ewes on pasture were randomly allocated to two groups: TG, suppressively treated group every four weeks with levamisole and UG, untreated group. Faecal nematode egg counts and larval differentiation were conducted monthly. Successive groups of worm free tracer lambs were grazed with ewes and then slaughtered for worm counts. Test-day milk yield of individual ewes was recorded and ewe machine-milking period length (MPL) were estimated. Faecal egg counts and tracer nematode numbers increased towards midsummer and declined sharply toward the end of the study. TG (188.0 ± 60 liters) produced more (p < 0.066) milk liters than UG (171.9 ± 52.2) and TG had significantly more extended (p < 0.041) MPL than those of UG. The present study showed that dairy sheep were negatively affected by worms, even when exposed to short periods of high acute nematode (mainly Haemonchus contortus) infection.
66 brebis laitières de race Pampinta ont été suivies afin d’évaluer la relation entre infestation par des nématodes gastrointestinaux et production de lait. Des brebis pâturant sur des prairies naturellement infestées ont été scindées en deux groupes : le premier TG est traité suppressivement toutes les quatre semaines avec du lévamisole, et le second UG, n’est pas traité et sert de témoin. Des examens coproscopiques mensuels ont été réalisés ainsi que des coprocultures pour identifier les espèces de nématodes. Des cohortes successives d’agneaux traceurs (agneaux non infestés et mis sur les parcelles) ont été utilisées afin de déterminer le niveau d’infestation après autopsie parasitaire. Les quantités journalières de lait produit, ainsi que la durée de lactation (MPL) ont été évaluées. Les excrétions d’oeufs dans les matières fécales ont augmenté jusqu’au milieu de l’été et ont ensuite déclinés vers la fin de l’étude. Le lot de TG (188 ± 60 litres) a produit plus de lait (p < 0.066) que UG (171.9 ± 52.2 litres) et MPL était plus long chez le lot TG (p < 0.041). L’étude montre que les brebis sont affectées négativement, même quand elles sont exposées à une infestation importante (principalement Haemonchus contortus) de courte durée.
EEA INTA Anguil
Fil: Suarez, Victor Humberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina
Fil: Cristel, Silvina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina
Fil: Busetti, Margarita Rosa. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina
Fuente
Parasit 16 (2) : 141-147 (June 2009)
Materia
Ovinos
Leche
Oveja Lechera
Nematodos
La Pampa
Sheep
Milk
Dairy Sheep
Nematodes
Milk Production
Producción Lechera
Raza Pampinta
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/27142
Acceder
id INTADig_62cad9ef4d74eeb377758ee425840781
oai_identifier_str oai:localhost:20.500.12123/27142
network_acronym_str INTADig
repository_id_str l
network_name_str INTA Digital (INTA)
spelling Epidemiology and effects of gastrointestional nematode infection on milk productions of dairy ewesSuarez, Victor HumbertoCristel, Silvina LujanBusetti, Margarita RosaOvinosLecheOveja LecheraNematodosLa PampaSheepMilkDairy SheepNematodesMilk ProductionProducción LecheraRaza Pampinta66 Pampinta breed ewes were studied during milking to evaluate the infection and the effect of gastrointestinal nematode on milk production sheep system. Naturally infected ewes on pasture were randomly allocated to two groups: TG, suppressively treated group every four weeks with levamisole and UG, untreated group. Faecal nematode egg counts and larval differentiation were conducted monthly. Successive groups of worm free tracer lambs were grazed with ewes and then slaughtered for worm counts. Test-day milk yield of individual ewes was recorded and ewe machine-milking period length (MPL) were estimated. Faecal egg counts and tracer nematode numbers increased towards midsummer and declined sharply toward the end of the study. TG (188.0 ± 60 liters) produced more (p < 0.066) milk liters than UG (171.9 ± 52.2) and TG had significantly more extended (p < 0.041) MPL than those of UG. The present study showed that dairy sheep were negatively affected by worms, even when exposed to short periods of high acute nematode (mainly Haemonchus contortus) infection.66 brebis laitières de race Pampinta ont été suivies afin d’évaluer la relation entre infestation par des nématodes gastrointestinaux et production de lait. Des brebis pâturant sur des prairies naturellement infestées ont été scindées en deux groupes : le premier TG est traité suppressivement toutes les quatre semaines avec du lévamisole, et le second UG, n’est pas traité et sert de témoin. Des examens coproscopiques mensuels ont été réalisés ainsi que des coprocultures pour identifier les espèces de nématodes. Des cohortes successives d’agneaux traceurs (agneaux non infestés et mis sur les parcelles) ont été utilisées afin de déterminer le niveau d’infestation après autopsie parasitaire. Les quantités journalières de lait produit, ainsi que la durée de lactation (MPL) ont été évaluées. Les excrétions d’oeufs dans les matières fécales ont augmenté jusqu’au milieu de l’été et ont ensuite déclinés vers la fin de l’étude. Le lot de TG (188 ± 60 litres) a produit plus de lait (p < 0.066) que UG (171.9 ± 52.2 litres) et MPL était plus long chez le lot TG (p < 0.041). L’étude montre que les brebis sont affectées négativement, même quand elles sont exposées à une infestation importante (principalement Haemonchus contortus) de courte durée.EEA INTA AnguilFil: Suarez, Victor Humberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; ArgentinaFil: Cristel, Silvina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; ArgentinaFil: Busetti, Margarita Rosa. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; ArgentinaSociete Francaise de Parasitologie2026-07-27T10:01:09Z2026-07-27T10:01:09Z2009-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/27142https://www.parasite-journal.org/articles/parasite/abs/2009/02/parasite2009162p141/parasite2009162p141.html1776-1042https://doi.org/10.1051/parasite/2009162141Parasit 16 (2) : 141-147 (June 2009)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2026-09-24T11:43:30Zoai:localhost:20.500.12123/27142instacron: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 11:43:31.417INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Epidemiology and effects of gastrointestional nematode infection on milk productions of dairy ewes
title Epidemiology and effects of gastrointestional nematode infection on milk productions of dairy ewes
spellingShingle Epidemiology and effects of gastrointestional nematode infection on milk productions of dairy ewes
Suarez, Victor Humberto
Ovinos
Leche
Oveja Lechera
Nematodos
La Pampa
Sheep
Milk
Dairy Sheep
Nematodes
Milk Production
Producción Lechera
Raza Pampinta
title_short Epidemiology and effects of gastrointestional nematode infection on milk productions of dairy ewes
title_full Epidemiology and effects of gastrointestional nematode infection on milk productions of dairy ewes
title_fullStr Epidemiology and effects of gastrointestional nematode infection on milk productions of dairy ewes
title_full_unstemmed Epidemiology and effects of gastrointestional nematode infection on milk productions of dairy ewes
title_sort Epidemiology and effects of gastrointestional nematode infection on milk productions of dairy ewes
dc.creator.none.fl_str_mv Suarez, Victor Humberto
Cristel, Silvina Lujan
Busetti, Margarita Rosa
author Suarez, Victor Humberto
author_facet Suarez, Victor Humberto
Cristel, Silvina Lujan
Busetti, Margarita Rosa
author_role author
author2 Cristel, Silvina Lujan
Busetti, Margarita Rosa
author2_role author
author
dc.subject.none.fl_str_mv Ovinos
Leche
Oveja Lechera
Nematodos
La Pampa
Sheep
Milk
Dairy Sheep
Nematodes
Milk Production
Producción Lechera
Raza Pampinta
topic Ovinos
Leche
Oveja Lechera
Nematodos
La Pampa
Sheep
Milk
Dairy Sheep
Nematodes
Milk Production
Producción Lechera
Raza Pampinta
dc.description.none.fl_txt_mv 66 Pampinta breed ewes were studied during milking to evaluate the infection and the effect of gastrointestinal nematode on milk production sheep system. Naturally infected ewes on pasture were randomly allocated to two groups: TG, suppressively treated group every four weeks with levamisole and UG, untreated group. Faecal nematode egg counts and larval differentiation were conducted monthly. Successive groups of worm free tracer lambs were grazed with ewes and then slaughtered for worm counts. Test-day milk yield of individual ewes was recorded and ewe machine-milking period length (MPL) were estimated. Faecal egg counts and tracer nematode numbers increased towards midsummer and declined sharply toward the end of the study. TG (188.0 ± 60 liters) produced more (p < 0.066) milk liters than UG (171.9 ± 52.2) and TG had significantly more extended (p < 0.041) MPL than those of UG. The present study showed that dairy sheep were negatively affected by worms, even when exposed to short periods of high acute nematode (mainly Haemonchus contortus) infection.
66 brebis laitières de race Pampinta ont été suivies afin d’évaluer la relation entre infestation par des nématodes gastrointestinaux et production de lait. Des brebis pâturant sur des prairies naturellement infestées ont été scindées en deux groupes : le premier TG est traité suppressivement toutes les quatre semaines avec du lévamisole, et le second UG, n’est pas traité et sert de témoin. Des examens coproscopiques mensuels ont été réalisés ainsi que des coprocultures pour identifier les espèces de nématodes. Des cohortes successives d’agneaux traceurs (agneaux non infestés et mis sur les parcelles) ont été utilisées afin de déterminer le niveau d’infestation après autopsie parasitaire. Les quantités journalières de lait produit, ainsi que la durée de lactation (MPL) ont été évaluées. Les excrétions d’oeufs dans les matières fécales ont augmenté jusqu’au milieu de l’été et ont ensuite déclinés vers la fin de l’étude. Le lot de TG (188 ± 60 litres) a produit plus de lait (p < 0.066) que UG (171.9 ± 52.2 litres) et MPL était plus long chez le lot TG (p < 0.041). L’étude montre que les brebis sont affectées négativement, même quand elles sont exposées à une infestation importante (principalement Haemonchus contortus) de courte durée.
EEA INTA Anguil
Fil: Suarez, Victor Humberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina
Fil: Cristel, Silvina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina
Fil: Busetti, Margarita Rosa. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina
description 66 Pampinta breed ewes were studied during milking to evaluate the infection and the effect of gastrointestinal nematode on milk production sheep system. Naturally infected ewes on pasture were randomly allocated to two groups: TG, suppressively treated group every four weeks with levamisole and UG, untreated group. Faecal nematode egg counts and larval differentiation were conducted monthly. Successive groups of worm free tracer lambs were grazed with ewes and then slaughtered for worm counts. Test-day milk yield of individual ewes was recorded and ewe machine-milking period length (MPL) were estimated. Faecal egg counts and tracer nematode numbers increased towards midsummer and declined sharply toward the end of the study. TG (188.0 ± 60 liters) produced more (p < 0.066) milk liters than UG (171.9 ± 52.2) and TG had significantly more extended (p < 0.041) MPL than those of UG. The present study showed that dairy sheep were negatively affected by worms, even when exposed to short periods of high acute nematode (mainly Haemonchus contortus) infection.
publishDate 2009
dc.date.none.fl_str_mv 2009-06
2026-07-27T10:01:09Z
2026-07-27T10:01:09Z
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/20.500.12123/27142
https://www.parasite-journal.org/articles/parasite/abs/2009/02/parasite2009162p141/parasite2009162p141.html
1776-1042
https://doi.org/10.1051/parasite/2009162141
url http://hdl.handle.net/20.500.12123/27142
https://www.parasite-journal.org/articles/parasite/abs/2009/02/parasite2009162p141/parasite2009162p141.html
https://doi.org/10.1051/parasite/2009162141
identifier_str_mv 1776-1042
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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 openAccess
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 Societe Francaise de Parasitologie
publisher.none.fl_str_mv Societe Francaise de Parasitologie
dc.source.none.fl_str_mv Parasit 16 (2) : 141-147 (June 2009)
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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