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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
27/05/2024 |
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Data da última atualização: |
22/08/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AZEVEDO, B. T.; OLIVEIRA, H. N. DE; KATIKI, L. M.; VERCESI FILHO, A. E.; DOMINGOS, A. G.; ANTUNES, S.; OKINO, C. H.; OLIVEIRA, M. C. de S.; IBELLI, A. M. G.; GIGLIOTI, R. |
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Afiliação: |
BIANCA TAINÁ AZEVEDO, UNIVERSIDADE ESTADUAL PAULISTA; HENRIQUE NUNES DE OLIVEIRA, UNIVERSIDADE ESTADUAL PAULISTA; LUCIANA MORITA KATIKI, INSTITUTO DE ZOOTECNIA; ANIBAL EUGÊNIO VERCESI FILHO, INSTITUTO DE ZOOTECNIA; ANA GONÇALVES DOMINGOS, UNIVERSIDADE NOVA DE LISBOA; SANDRA ANTUNES, UNIVERSIDADE NOVA DE LISBOA; CINTIA HIROMI OKINO, CPPSE; MARCIA CRISTINA DE SENA OLIVEIRA, CPPSE; ADRIANA MERCIA GUARATINI IBELLI, CPPSE; RODRIGO GIGLIOTI, INSTITUTO DE ZOOTECNIA. |
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Título: |
A small proportion of Zebu genetic background in crossbred calves may not be enough to improve resistance against natural bovine Babesia spp. infections. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Veterinary Parasitology, v. 328, 2024, 110165. |
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Páginas: |
7 p. |
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DOI: |
10.1016/j.vetpar.2024.110165 |
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Idioma: |
Inglês |
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Conteúdo: |
The main objective of cattle breeders in tropical and subtropical regions is to acquire animals with taurine-productive traits adapted to the broad weather range of these regions. However, one of the main challenges on using taurine genetics in these areas is the high susceptibility of these animals to tick-borne diseases. Consequently, the present study evaluated from 10 November 2021–19 April 2022, the over 13 assessments, the Babesia bovis and Babesia bigemina DNA loads and the IgG anti-B. bovis and anti-B. bigemina levels in Angus (n = 17, 100% Taurine) and Ultrablack (n = 14, ~82% taurine and 18% Zebu) calves. Data were analyzed using a multivariate mixed model with repeated measures of the same animal including the fixed effects of evaluation, genetic group, sex, Babesia spp., and their interactions. The repeatability values were estimated from the (co) variances matrix and expressed for each species. The correlations between the DNA loads (CNlog) and IgG titers (S/P) values for the two species were also estimated using the same model. Regarding the specific IgG antibody titers for both Babesia spp., no significant differences were observed between the two genetic groups. However, for B. bovis and B. bigemina DNA loads, Ultrablack calves presented significantly higher values than Angus calves. Under the conditions evaluated in this study, our findings suggest that the low percentage of Zebu genetic in the Ultrablack breed was insufficient to improve resistance against babesiosis. Further studies must demonstrate if the low percentages of Zebu genetics in Taurine breeds can modify the susceptibility to babesiosis infections. MenosThe main objective of cattle breeders in tropical and subtropical regions is to acquire animals with taurine-productive traits adapted to the broad weather range of these regions. However, one of the main challenges on using taurine genetics in these areas is the high susceptibility of these animals to tick-borne diseases. Consequently, the present study evaluated from 10 November 2021–19 April 2022, the over 13 assessments, the Babesia bovis and Babesia bigemina DNA loads and the IgG anti-B. bovis and anti-B. bigemina levels in Angus (n = 17, 100% Taurine) and Ultrablack (n = 14, ~82% taurine and 18% Zebu) calves. Data were analyzed using a multivariate mixed model with repeated measures of the same animal including the fixed effects of evaluation, genetic group, sex, Babesia spp., and their interactions. The repeatability values were estimated from the (co) variances matrix and expressed for each species. The correlations between the DNA loads (CNlog) and IgG titers (S/P) values for the two species were also estimated using the same model. Regarding the specific IgG antibody titers for both Babesia spp., no significant differences were observed between the two genetic groups. However, for B. bovis and B. bigemina DNA loads, Ultrablack calves presented significantly higher values than Angus calves. Under the conditions evaluated in this study, our findings suggest that the low percentage of Zebu genetic in the Ultrablack breed was insufficient to improve resistance against ... Mostrar Tudo |
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Palavras-Chave: |
Antibody; Bovine resistance; Genetic group. |
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Thesaurus Nal: |
Babesiosis; Parasite load. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
null
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Registro original: |
Embrapa Pecuária Sudeste (CPPSE) |
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