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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
20/03/2024 |
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Data da última atualização: |
20/03/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
COSTA, R. G. B.; PAIXÃO, M. G.; SOUZA, G. N. de; PINTO, S. M.; ABREU, L. R. de. |
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Afiliação: |
RENATA GOLIN BUENO COSTA, EPAMIG; MARCEL GOMES PAIXÃO, EPAMIG; GUILHERME NUNES DE SOUZA, CNPGL; SANDRA MARIA PINTO, UNIVERSIDADE FEDERAL DE LAVRAS; LUIZ RONALDO DE ABREU, UNIVERSIDADE FEDERAL DE LAVRAS. |
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Título: |
Milk composition and health status of quarters adjacent to an on-farm protocol-treated clinical-mastitis gland. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Animal Production Science, v. 64, AN23176, 2024. |
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DOI: |
https://doi.org/10.1071/AN23176 |
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Idioma: |
Inglês |
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Conteúdo: |
CONTEXT- The hypothesis of interdependency among cows’ mammary glands has been shown, and quarters adjacent to glands with clinical mastitis may have their composition and health status impaired. AIMS- The main focus of this study was to compare foremilk composition (fat, total protein, lactose, solids non-fat (SNF), and chloride) and health status (somatic cell count (SCC), differential leukocytes) of healthy mammary glands adjacent to a gland previously treated (on average, 24 days after treatment, varying from 20 to 39 days) for clinical mastitis with foremilk samples of healthy mammary glands of healthy cows. Our previous study compared these traits (foremilk composition and health status) between healthy mammary glands adjacent to a mastitisinfected quarter and healthy mammary glands from healthy cows (no clinical mastitis) immediately after the identification of mastitis on case quarters. METHODS- The study was designed as a prospective case–control study and the enrolled cows (cases and controls) were matched by days in milk and parity. Case cows (n = 50) were defined as cows that previously had a single quarter infected with mild or moderate clinical mastitis, and which were treated according to an on-farm protocol 1 day after mastitis identification. Control cows (n = 50) were defined as cows that had not suffered clinical mastitis in the current lactation. Foremilk samples from each quarter of case and control cows were collected so as to assess concentrations of fat, total protein, lactose, SCC, and SNF, conduct microbiological analyses, and determine the concentration of chloride and differential leukocyte counts. Multivariate linear regression and logistic regression analyses were performed to assess possible associations of milk-composition and health-status traits between quarter types (case or control cows). KEY RESULTS-On average, 24 days after the treatment of the case quarter began, milk composition (fat, lactose, SNF, and chloride) and some health status (lymphocyte and macrophage counts) of adjacent quarters returned to similar levels as in control quarters, while total protein, SCC, and neutrophils remained greater for adjacent quarters. No effect of quarter position or microbiological results of enrolled quarters were identified. CONCLUSIONS-Our results suggested that at least 20 days (average of 24 days) after an episode of clinical mastitis in a neighbouring gland, adjacent quarters were still recovering from this mastitis episode, and we conclude that interdependency of quarters is a physiological systemic two-way immune response route, and each particular milk component has a different behaviour after clinical mastitis. IMPLICATIONS-Our results suggest that clinical mastitis is far more costly for producers and industry than has been previously reported. Bovine mastitis is the disease that causes the most economical losses to dairy farmers, including veterinary expenses, milk disposal, loss of production and reduction of animal pregnancies. The milk composition of the mammary quarter affected by mastitis is not the only one compromised, because the milk quality of the entire udder is also affected. A period of 20 days is not enough for animals to fully recover from a case of udder inflammation. Mastitis is more costly to producers and industry than has been previously reported. MenosCONTEXT- The hypothesis of interdependency among cows’ mammary glands has been shown, and quarters adjacent to glands with clinical mastitis may have their composition and health status impaired. AIMS- The main focus of this study was to compare foremilk composition (fat, total protein, lactose, solids non-fat (SNF), and chloride) and health status (somatic cell count (SCC), differential leukocytes) of healthy mammary glands adjacent to a gland previously treated (on average, 24 days after treatment, varying from 20 to 39 days) for clinical mastitis with foremilk samples of healthy mammary glands of healthy cows. Our previous study compared these traits (foremilk composition and health status) between healthy mammary glands adjacent to a mastitisinfected quarter and healthy mammary glands from healthy cows (no clinical mastitis) immediately after the identification of mastitis on case quarters. METHODS- The study was designed as a prospective case–control study and the enrolled cows (cases and controls) were matched by days in milk and parity. Case cows (n = 50) were defined as cows that previously had a single quarter infected with mild or moderate clinical mastitis, and which were treated according to an on-farm protocol 1 day after mastitis identification. Control cows (n = 50) were defined as cows that had not suffered clinical mastitis in the current lactation. Foremilk samples from each quarter of case and control cows were collected so as to assess concentrations of f... Mostrar Tudo |
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Palavras-Chave: |
Mastite. |
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Thesagro: |
Doença Animal; Gado Leiteiro; Leite; Produção Leiteira. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 04097naa a2200241 a 4500
001 2163038
005 2024-03-20
008 2024 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1071/AN23176$2DOI
100 1 $aCOSTA, R. G. B.
245 $aMilk composition and health status of quarters adjacent to an on-farm protocol-treated clinical-mastitis gland.$h[electronic resource]
260 $c2024
520 $aCONTEXT- The hypothesis of interdependency among cows’ mammary glands has been shown, and quarters adjacent to glands with clinical mastitis may have their composition and health status impaired. AIMS- The main focus of this study was to compare foremilk composition (fat, total protein, lactose, solids non-fat (SNF), and chloride) and health status (somatic cell count (SCC), differential leukocytes) of healthy mammary glands adjacent to a gland previously treated (on average, 24 days after treatment, varying from 20 to 39 days) for clinical mastitis with foremilk samples of healthy mammary glands of healthy cows. Our previous study compared these traits (foremilk composition and health status) between healthy mammary glands adjacent to a mastitisinfected quarter and healthy mammary glands from healthy cows (no clinical mastitis) immediately after the identification of mastitis on case quarters. METHODS- The study was designed as a prospective case–control study and the enrolled cows (cases and controls) were matched by days in milk and parity. Case cows (n = 50) were defined as cows that previously had a single quarter infected with mild or moderate clinical mastitis, and which were treated according to an on-farm protocol 1 day after mastitis identification. Control cows (n = 50) were defined as cows that had not suffered clinical mastitis in the current lactation. Foremilk samples from each quarter of case and control cows were collected so as to assess concentrations of fat, total protein, lactose, SCC, and SNF, conduct microbiological analyses, and determine the concentration of chloride and differential leukocyte counts. Multivariate linear regression and logistic regression analyses were performed to assess possible associations of milk-composition and health-status traits between quarter types (case or control cows). KEY RESULTS-On average, 24 days after the treatment of the case quarter began, milk composition (fat, lactose, SNF, and chloride) and some health status (lymphocyte and macrophage counts) of adjacent quarters returned to similar levels as in control quarters, while total protein, SCC, and neutrophils remained greater for adjacent quarters. No effect of quarter position or microbiological results of enrolled quarters were identified. CONCLUSIONS-Our results suggested that at least 20 days (average of 24 days) after an episode of clinical mastitis in a neighbouring gland, adjacent quarters were still recovering from this mastitis episode, and we conclude that interdependency of quarters is a physiological systemic two-way immune response route, and each particular milk component has a different behaviour after clinical mastitis. IMPLICATIONS-Our results suggest that clinical mastitis is far more costly for producers and industry than has been previously reported. Bovine mastitis is the disease that causes the most economical losses to dairy farmers, including veterinary expenses, milk disposal, loss of production and reduction of animal pregnancies. The milk composition of the mammary quarter affected by mastitis is not the only one compromised, because the milk quality of the entire udder is also affected. A period of 20 days is not enough for animals to fully recover from a case of udder inflammation. Mastitis is more costly to producers and industry than has been previously reported.
650 $aDoença Animal
650 $aGado Leiteiro
650 $aLeite
650 $aProdução Leiteira
653 $aMastite
700 1 $aPAIXÃO, M. G.
700 1 $aSOUZA, G. N. de
700 1 $aPINTO, S. M.
700 1 $aABREU, L. R. de
773 $tAnimal Production Science$gv. 64, AN23176, 2024.
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Embrapa Gado de Leite (CNPGL) |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
04/09/2012 |
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Data da última atualização: |
28/09/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
GUIMARAES, L. J. M.; MIRANDA, G. M.; LIMA, R. O. de; MAIA, C.; OLIVEIRA, L. R. de; SOUZA, L. V. de. |
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Afiliação: |
LAURO JOSE MOREIRA GUIMARAES, CNPMS; GLAUCO MOREIRA MIRANDA, UFV; RODRIGO OLIVEIRA DE LIMA, UFV; CIRO MAIA, UFV; LUCIMAR RODRIGUES DE OLIVEIRA, UFV; LEANDRO VAGNO DE SOUZA, Dow Agrosciences. |
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Título: |
Performance of testers with different genetic structure for evaluation of maize inbred lines. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Ciência Rural, Santa Maria, v. 42, n. 5, p. 770-776, 2012. |
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DOI: |
10.1590/S0103-84782012000500002 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT: The objective of this study was to evaluate four maize testers for identification of superior inbreed lines in testcross. The four testers evaluated are cultivars with narrow or wide genetic base (single-cross hybrids and open pollinated varieties) and two kernel types (flint or dent). SynD and SynF testers are open pollinated varieties with dent and flint kernels, respectively, and FSH and DSH testers are single-cross hybrids with flint and dent kernels, respectively. SynD tester showed the biggest genetic variance among the maize inbreed lines in crosses. The effects of general combining ability (GCA) for lines and specific combining ability (SCA) for lines x testers were significant, whereas GCA effects for testers were not significant. SynD and SynF testers identified the largest number of lines with higher GCA. The DSH and FSH testers showed suitable to identify lines with high SCA. It was concluded that SynD and SynF testers are adequate to identify inbreed lines with high GCA effects, and it?s possible to identify new lines with high heterotic potential in each one of the four testers. RESUMO: O objetivo deste estudo foi avaliar quatro testadores de milho quanto à capacidade de identificar linhagens superiores em testcross. Os quatro testadores avaliados são cultivares com base genética ampla (variedades de polinização aberta) e estreita (híbridos simples) e dois tipos de grãos (duro e dentado). Os testadores SynD e SynF são populações de milho de polinização aberta com grãos dentados e duros, respectivamente, e FSH e DSH são híbridos simples com grãos duros e dentados, respectivamente. O testador SynD possibilitou a maior expressão de variância genética entre os cruzamentos com as linhagens. A capacidade geral de combinação (CGC) das linhagens e a capacidade específica de combinação (CEC) entre linhagens e testadores foram significativas, enquanto que os efeitos de CGC dos testadores foram não significativos. Concluiu-se que os testadores SynD e SynF mostram-se adequados para identificar linhagens com maiores efeitos de GCA e é possível identificar novas linhagens com alto potencial heterótico com cada um dos quatro testadores utilizados. MenosABSTRACT: The objective of this study was to evaluate four maize testers for identification of superior inbreed lines in testcross. The four testers evaluated are cultivars with narrow or wide genetic base (single-cross hybrids and open pollinated varieties) and two kernel types (flint or dent). SynD and SynF testers are open pollinated varieties with dent and flint kernels, respectively, and FSH and DSH testers are single-cross hybrids with flint and dent kernels, respectively. SynD tester showed the biggest genetic variance among the maize inbreed lines in crosses. The effects of general combining ability (GCA) for lines and specific combining ability (SCA) for lines x testers were significant, whereas GCA effects for testers were not significant. SynD and SynF testers identified the largest number of lines with higher GCA. The DSH and FSH testers showed suitable to identify lines with high SCA. It was concluded that SynD and SynF testers are adequate to identify inbreed lines with high GCA effects, and it?s possible to identify new lines with high heterotic potential in each one of the four testers. RESUMO: O objetivo deste estudo foi avaliar quatro testadores de milho quanto à capacidade de identificar linhagens superiores em testcross. Os quatro testadores avaliados são cultivares com base genética ampla (variedades de polinização aberta) e estreita (híbridos simples) e dois tipos de grãos (duro e dentado). Os testadores SynD e SynF são populações de milho de polinizaçã... Mostrar Tudo |
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Palavras-Chave: |
Capacidade de combinação; Dialelo. |
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Thesagro: |
Milho; Zea Mays. |
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Categoria do assunto: |
S Ciências Biológicas |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/65568/1/Performance-testers-1.pdf
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Marc: |
LEADER 02948naa a2200241 a 4500
001 1932987
005 2017-09-28
008 2012 bl uuuu u00u1 u #d
024 7 $a10.1590/S0103-84782012000500002$2DOI
100 1 $aGUIMARAES, L. J. M.
245 $aPerformance of testers with different genetic structure for evaluation of maize inbred lines.$h[electronic resource]
260 $c2012
520 $aABSTRACT: The objective of this study was to evaluate four maize testers for identification of superior inbreed lines in testcross. The four testers evaluated are cultivars with narrow or wide genetic base (single-cross hybrids and open pollinated varieties) and two kernel types (flint or dent). SynD and SynF testers are open pollinated varieties with dent and flint kernels, respectively, and FSH and DSH testers are single-cross hybrids with flint and dent kernels, respectively. SynD tester showed the biggest genetic variance among the maize inbreed lines in crosses. The effects of general combining ability (GCA) for lines and specific combining ability (SCA) for lines x testers were significant, whereas GCA effects for testers were not significant. SynD and SynF testers identified the largest number of lines with higher GCA. The DSH and FSH testers showed suitable to identify lines with high SCA. It was concluded that SynD and SynF testers are adequate to identify inbreed lines with high GCA effects, and it?s possible to identify new lines with high heterotic potential in each one of the four testers. RESUMO: O objetivo deste estudo foi avaliar quatro testadores de milho quanto à capacidade de identificar linhagens superiores em testcross. Os quatro testadores avaliados são cultivares com base genética ampla (variedades de polinização aberta) e estreita (híbridos simples) e dois tipos de grãos (duro e dentado). Os testadores SynD e SynF são populações de milho de polinização aberta com grãos dentados e duros, respectivamente, e FSH e DSH são híbridos simples com grãos duros e dentados, respectivamente. O testador SynD possibilitou a maior expressão de variância genética entre os cruzamentos com as linhagens. A capacidade geral de combinação (CGC) das linhagens e a capacidade específica de combinação (CEC) entre linhagens e testadores foram significativas, enquanto que os efeitos de CGC dos testadores foram não significativos. Concluiu-se que os testadores SynD e SynF mostram-se adequados para identificar linhagens com maiores efeitos de GCA e é possível identificar novas linhagens com alto potencial heterótico com cada um dos quatro testadores utilizados.
650 $aMilho
650 $aZea Mays
653 $aCapacidade de combinação
653 $aDialelo
700 1 $aMIRANDA, G. M.
700 1 $aLIMA, R. O. de
700 1 $aMAIA, C.
700 1 $aOLIVEIRA, L. R. de
700 1 $aSOUZA, L. V. de
773 $tCiência Rural, Santa Maria$gv. 42, n. 5, p. 770-776, 2012.
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Embrapa Milho e Sorgo (CNPMS) |
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