Resistance to the tick Rhipicephalus microplus and Babesia bovis infection levels in beef heifers raised in an endemic area of Sao Paulo state, Brazil

Detalhes bibliográficos
Autor(a) principal: Maiorano, A. M. [UNESP]
Data de Publicação: 2019
Outros Autores: Giglioti, R. [UNESP], Oliveira, M. C. S., Oliveira, H. N. [UNESP], Cyrillo, J. N. S. G., Mercadante, M. E. Z., Silva, J. A. I. I. V. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1071/AN17157
http://hdl.handle.net/11449/184453
Resumo: Repeatability coefficients (r) for tick resistance and Babesia bovis infection levels and the correlation () between these traits were estimated in beef heifers, using artificial infestations and short intervals between measurements. Forty heifers, including 20 Bos taurus taurus (Caracu) and 20 Bos taurus indicus (Nelore) animals, were submitted to three artificial infestations with Rhipicephalus microplus larvae at intervals of 14 days. The number of standard female was counted from the 19th through the 23rd day after each infestation, considering only the left side of each animal. Blood samples were collected on Days 0, 6, 20, 34 and 48 after the first infestation. The number of copies of B. bovis DNA (CN) was estimated from blood samples through the quantitative PCR technique to evaluate the level of infection in the animals. Total tick count (TTC), the percentage of return (PRij) and CN were analysed using the MIXED procedure of the SAS program. The r of the variables were estimated by intraclass correlation between measures of the same animal, with the variance component of the animal being divided by the phenotypic variance (residual + animal), using models with a CS structure matrix. Additionally, among variables were estimated using the CORR procedure. The following results were obtained for Caracu and Nelore animals, respectively: 1.83 +/- 0.37 and 0.63 +/- 0.40 for TTC, 1.10 +/- 0.23 and 0.47 +/- 0.23 for PRij, and 2.29 +/- 0.64 and 2.32 +/- 0.58 for CN. The r was moderate for TTC (0.62) and PRij (0.53) and low for CN (0.10). The between TTC and CN obtained in the same measurement day was not significant in either breed (P > 0.05; -0.07 for Caracu and 0.19 for Nelore). Results showed both breeds were able to develop resistance against B. bovis; however, Nelore exhibited higher tick resistance. The r obtained for CN and the weak association with tick resistance indicate that it is not possible to recommend the use of CN as a trait to predict tick resistance in these two breeds.
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spelling Resistance to the tick Rhipicephalus microplus and Babesia bovis infection levels in beef heifers raised in an endemic area of Sao Paulo state, Brazilartificial infestationscattleqPCRrepeatabilityRepeatability coefficients (r) for tick resistance and Babesia bovis infection levels and the correlation () between these traits were estimated in beef heifers, using artificial infestations and short intervals between measurements. Forty heifers, including 20 Bos taurus taurus (Caracu) and 20 Bos taurus indicus (Nelore) animals, were submitted to three artificial infestations with Rhipicephalus microplus larvae at intervals of 14 days. The number of standard female was counted from the 19th through the 23rd day after each infestation, considering only the left side of each animal. Blood samples were collected on Days 0, 6, 20, 34 and 48 after the first infestation. The number of copies of B. bovis DNA (CN) was estimated from blood samples through the quantitative PCR technique to evaluate the level of infection in the animals. Total tick count (TTC), the percentage of return (PRij) and CN were analysed using the MIXED procedure of the SAS program. The r of the variables were estimated by intraclass correlation between measures of the same animal, with the variance component of the animal being divided by the phenotypic variance (residual + animal), using models with a CS structure matrix. Additionally, among variables were estimated using the CORR procedure. The following results were obtained for Caracu and Nelore animals, respectively: 1.83 +/- 0.37 and 0.63 +/- 0.40 for TTC, 1.10 +/- 0.23 and 0.47 +/- 0.23 for PRij, and 2.29 +/- 0.64 and 2.32 +/- 0.58 for CN. The r was moderate for TTC (0.62) and PRij (0.53) and low for CN (0.10). The between TTC and CN obtained in the same measurement day was not significant in either breed (P > 0.05; -0.07 for Caracu and 0.19 for Nelore). Results showed both breeds were able to develop resistance against B. bovis; however, Nelore exhibited higher tick resistance. The r obtained for CN and the weak association with tick resistance indicate that it is not possible to recommend the use of CN as a trait to predict tick resistance in these two breeds.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Estadual Paulista, Fac Ciencias Agr & Vet, Jaboticabal, SP, BrazilEmpresa Brasileira Pesquisa Agr, Sao Carlos, SP, BrazilInst Zootecnia, Sertaozinho, SP, BrazilUniv Estadual Paulista, Fac Med Vet & Zootecnia, Botucatu, SP, BrazilUniv Estadual Paulista, Fac Ciencias Agr & Vet, Jaboticabal, SP, BrazilUniv Estadual Paulista, Fac Med Vet & Zootecnia, Botucatu, SP, BrazilCsiro PublishingUniversidade Estadual Paulista (Unesp)Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)Inst ZootecniaMaiorano, A. M. [UNESP]Giglioti, R. [UNESP]Oliveira, M. C. S.Oliveira, H. N. [UNESP]Cyrillo, J. N. S. G.Mercadante, M. E. Z.Silva, J. A. I. I. V. [UNESP]2019-10-04T12:13:42Z2019-10-04T12:13:42Z2019-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article938-944http://dx.doi.org/10.1071/AN17157Animal Production Science. Clayton: Csiro Publishing, v. 59, n. 5, p. 938-944, 2019.1836-0939http://hdl.handle.net/11449/18445310.1071/AN17157WOS:000465239400015Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAnimal Production Scienceinfo:eu-repo/semantics/openAccess2021-10-23T17:52:05Zoai:repositorio.unesp.br:11449/184453Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:00:48.570947Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Resistance to the tick Rhipicephalus microplus and Babesia bovis infection levels in beef heifers raised in an endemic area of Sao Paulo state, Brazil
title Resistance to the tick Rhipicephalus microplus and Babesia bovis infection levels in beef heifers raised in an endemic area of Sao Paulo state, Brazil
spellingShingle Resistance to the tick Rhipicephalus microplus and Babesia bovis infection levels in beef heifers raised in an endemic area of Sao Paulo state, Brazil
Maiorano, A. M. [UNESP]
artificial infestations
cattle
qPCR
repeatability
title_short Resistance to the tick Rhipicephalus microplus and Babesia bovis infection levels in beef heifers raised in an endemic area of Sao Paulo state, Brazil
title_full Resistance to the tick Rhipicephalus microplus and Babesia bovis infection levels in beef heifers raised in an endemic area of Sao Paulo state, Brazil
title_fullStr Resistance to the tick Rhipicephalus microplus and Babesia bovis infection levels in beef heifers raised in an endemic area of Sao Paulo state, Brazil
title_full_unstemmed Resistance to the tick Rhipicephalus microplus and Babesia bovis infection levels in beef heifers raised in an endemic area of Sao Paulo state, Brazil
title_sort Resistance to the tick Rhipicephalus microplus and Babesia bovis infection levels in beef heifers raised in an endemic area of Sao Paulo state, Brazil
author Maiorano, A. M. [UNESP]
author_facet Maiorano, A. M. [UNESP]
Giglioti, R. [UNESP]
Oliveira, M. C. S.
Oliveira, H. N. [UNESP]
Cyrillo, J. N. S. G.
Mercadante, M. E. Z.
Silva, J. A. I. I. V. [UNESP]
author_role author
author2 Giglioti, R. [UNESP]
Oliveira, M. C. S.
Oliveira, H. N. [UNESP]
Cyrillo, J. N. S. G.
Mercadante, M. E. Z.
Silva, J. A. I. I. V. [UNESP]
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
Inst Zootecnia
dc.contributor.author.fl_str_mv Maiorano, A. M. [UNESP]
Giglioti, R. [UNESP]
Oliveira, M. C. S.
Oliveira, H. N. [UNESP]
Cyrillo, J. N. S. G.
Mercadante, M. E. Z.
Silva, J. A. I. I. V. [UNESP]
dc.subject.por.fl_str_mv artificial infestations
cattle
qPCR
repeatability
topic artificial infestations
cattle
qPCR
repeatability
description Repeatability coefficients (r) for tick resistance and Babesia bovis infection levels and the correlation () between these traits were estimated in beef heifers, using artificial infestations and short intervals between measurements. Forty heifers, including 20 Bos taurus taurus (Caracu) and 20 Bos taurus indicus (Nelore) animals, were submitted to three artificial infestations with Rhipicephalus microplus larvae at intervals of 14 days. The number of standard female was counted from the 19th through the 23rd day after each infestation, considering only the left side of each animal. Blood samples were collected on Days 0, 6, 20, 34 and 48 after the first infestation. The number of copies of B. bovis DNA (CN) was estimated from blood samples through the quantitative PCR technique to evaluate the level of infection in the animals. Total tick count (TTC), the percentage of return (PRij) and CN were analysed using the MIXED procedure of the SAS program. The r of the variables were estimated by intraclass correlation between measures of the same animal, with the variance component of the animal being divided by the phenotypic variance (residual + animal), using models with a CS structure matrix. Additionally, among variables were estimated using the CORR procedure. The following results were obtained for Caracu and Nelore animals, respectively: 1.83 +/- 0.37 and 0.63 +/- 0.40 for TTC, 1.10 +/- 0.23 and 0.47 +/- 0.23 for PRij, and 2.29 +/- 0.64 and 2.32 +/- 0.58 for CN. The r was moderate for TTC (0.62) and PRij (0.53) and low for CN (0.10). The between TTC and CN obtained in the same measurement day was not significant in either breed (P > 0.05; -0.07 for Caracu and 0.19 for Nelore). Results showed both breeds were able to develop resistance against B. bovis; however, Nelore exhibited higher tick resistance. The r obtained for CN and the weak association with tick resistance indicate that it is not possible to recommend the use of CN as a trait to predict tick resistance in these two breeds.
publishDate 2019
dc.date.none.fl_str_mv 2019-10-04T12:13:42Z
2019-10-04T12:13:42Z
2019-01-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1071/AN17157
Animal Production Science. Clayton: Csiro Publishing, v. 59, n. 5, p. 938-944, 2019.
1836-0939
http://hdl.handle.net/11449/184453
10.1071/AN17157
WOS:000465239400015
url http://dx.doi.org/10.1071/AN17157
http://hdl.handle.net/11449/184453
identifier_str_mv Animal Production Science. Clayton: Csiro Publishing, v. 59, n. 5, p. 938-944, 2019.
1836-0939
10.1071/AN17157
WOS:000465239400015
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Animal Production Science
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 938-944
dc.publisher.none.fl_str_mv Csiro Publishing
publisher.none.fl_str_mv Csiro Publishing
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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