Influence of targeted selective anthelmintic treatment on the productive performance of wool and hair lambs naturally infected with gastrointestinal nematodes in Brazil

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorAlbuquerque, Ana Cláudia A.-
Autor(es): dc.creatorAlmeida, Fabiana A.-
Autor(es): dc.creatorBassetto, Cesar C.-
Autor(es): dc.creatorAmarante, Alessandro F. T.-
Data de aceite: dc.date.accessioned2025-08-21T19:27:15Z-
Data de disponibilização: dc.date.available2025-08-21T19:27:15Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2022-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s11259-022-10061-2-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/246588-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/246588-
Descrição: dc.descriptionTargeted selective treatment (TST) is an alternative method to reduce the use of anthelmintics and delay the development of resistant nematode populations. However, there is limited information on the actual effects of this type of treatment on livestock productivity. The objective of this study was to evaluate the production performance of Santa Ines (hair) and Ile de France (wool) lambs naturally infected with gastrointestinal nematodes (GIN) under TST based on packed cell volume (PCV) versus suppressive anthelmintic treatments. Thirty-eight lambs were divided into two treatment groups: Suppressive treatment, animals were drenched with monepantel every two weeks and TST, animals were treated with the same anthelmintic when they presented PCV ≤ 20%. Feces, blood, and weight were measured weekly to determine eggs per gram of feces, PCV, total plasma protein, and weight gain. After animals were slaughtered, carcasses were weighed to determine carcass yield. In the TST group, substantial productive losses of approximately 21.3% in the wool and 25.9% in the hair lambs were observed in body weight compared to their counterparts. Significant differences in hematological variables occurred over the experimental period, especially in the wool lambs under TST. Favorable environmental conditions enabled infective larvae to survive and thrive on pasture. Haemonchus contortus and intestinal nematodes were the most common parasites found in the Ile de France lambs and the Santa Ines lambs, respectively. Although TST prevented mortality, it did not prevent production losses. Both breeds showed a significant drop in production due to GIN parasitism.-
Descrição: dc.descriptionSchool of Veterinary Medicine and Animal Science UNESP – São Paulo State University, SP-
Descrição: dc.descriptionInstitute of Biosciences UNESP – São Paulo State University, SP-
Descrição: dc.descriptionSchool of Veterinary Medicine and Animal Science UNESP – São Paulo State University, SP-
Descrição: dc.descriptionInstitute of Biosciences UNESP – São Paulo State University, SP-
Idioma: dc.languageen-
Relação: dc.relationVeterinary Research Communications-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAnthelmintic treatment-
Palavras-chave: dc.subjectHaemonchus-
Palavras-chave: dc.subjectHelminth infection-
Palavras-chave: dc.subjectProduction performance-
Palavras-chave: dc.subjectTrichostrongylus-
Título: dc.titleInfluence of targeted selective anthelmintic treatment on the productive performance of wool and hair lambs naturally infected with gastrointestinal nematodes in Brazil-
Tipo de arquivo: dc.typelivro digital-
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