Natural levels of Rhipicephalus microplus infestation and Anaplasma marginale infection in Angus and Ultrablack calves

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorInstituto de Zootecnia-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)-
Autor(es): dc.creatorFrabetti, Açucena Fragnan-
Autor(es): dc.creatorKatiki, Luciana Morita-
Autor(es): dc.creatorCaetano, Laura-
Autor(es): dc.creatorSarti, Mayne Barboza-
Autor(es): dc.creatorFalasca, Thamires Marocci-
Autor(es): dc.creatorPolli, Hiago-
Autor(es): dc.creatorVerissimo, Cecília José-
Autor(es): dc.creatorVercesi Filho, Anibal Eugênio-
Autor(es): dc.creatorde Oliveira, Henrique Nunes-
Autor(es): dc.creatorde Sena Oliveira, Márcia Cristina-
Autor(es): dc.creatorGiglioti, Rodrigo-
Data de aceite: dc.date.accessioned2025-08-21T20:49:23Z-
Data de disponibilização: dc.date.available2025-08-21T20:49:23Z-
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/s10493-022-00770-3-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/246603-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/246603-
Descrição: dc.descriptionInfections by Anaplasma marginale and infestations by Rhipicephalus microplus occur endemically in Brazil, representing an obstacle to expanding the use of taurine breeds, which are more susceptible. In this study, the levels of infection by A. marginale and infestation by R. microplus were monitored in 31 calves that were either purebred or had a high degree of taurine blood: 17 Angus (100% taurine) and 14 Ultrablack (ca. 82% taurine and 18% Zebu). The animals were evaluated on 13 occasions at 12-day intervals. The levels of A. marginale infection were determined by quantification of DNA copy number (CN) by qPCR, and ticks were monitored by two methods: counting adult females (≥ 4.5 mm) and scoring the level of tick infestation considering all visible instars in the animals’ bodies. No significant effects were observed between the means of CN of A. marginale, tick counts and scores among Angus and Ultrablack animals. The repeatability estimates for CN of A. marginale, tick counts and tick scores were 0.53, 0.12 and 0.16, respectively. The correlations between CN and tick counts and scores were close to zero, whereas the correlations between tick assessment methods were 0.57. The absence of differences between the two genetic groups indicates, under the conditions of the present study, that the low degree of Zebu blood did not influence the levels of infection by A. marginale or infestation by R. microplus. The results also suggest that the evaluation of the levels of infestation by ticks using scores can provide information closer to the real infestation rate considering that it uses all the visible instars of the parasites.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionInstituto de Zootecnia, Rua Heitor Penteado, 56, Nova Odessa-
Descrição: dc.descriptionUniversidade Estadual Júlio de Mesquita Filho Unesp Jaboticabal-
Descrição: dc.descriptionEmbrapa Pecuária Sudeste-
Descrição: dc.descriptionUniversidade Estadual Júlio de Mesquita Filho Unesp Jaboticabal-
Descrição: dc.descriptionFAPESP: 2018/19452-2-
Descrição: dc.descriptionFAPESP: 2019/22675-6-
Formato: dc.format131-140-
Idioma: dc.languageen-
Relação: dc.relationExperimental and Applied Acarology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBreed-
Palavras-chave: dc.subjectCorrelations-
Palavras-chave: dc.subjectqPCR-
Palavras-chave: dc.subjectRepeatability-
Palavras-chave: dc.subjectResistance-
Título: dc.titleNatural levels of Rhipicephalus microplus infestation and Anaplasma marginale infection in Angus and Ultrablack calves-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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