Mastite subclínica e relação da contagem de células somáticas com número de lactações, produção e composição química do leite em vacas da raça Holandesa

Cunha, R.P.L.; Molina, L. R.; Carvalho, A.Ú.; Filho, Elias Jorge Facury; Ferreira, Paulo Marcos; Gentilini, Marianna

doi:10.1590/s0102-09352008000100003

Cited by 54 publications

(64 citation statements)

References 8 publications

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“…Para Santos et al (2006), a mastite determina redução contínua na concentração de lactose no leite. Por ser o componente do leite com maior capacidade osmótica, a diminuição da lactose resulta na redução da produção de leite (CUNHA et al, 2008). Adicionalmente, a lactose está relacionada aos produtos em que o rendimento depende do teor de sólidos totais no leite, o que pode levar à queda no rendimento industrial e qualidade dos produtos lácteos (VIOTTO;CUNHA, 2006).…”

Section: Resultsunclassified

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Práticas De Higiene E a Qualidade Do Leite: Uma Análise a Partir Da Técnica De Clusters

Bánkuti

Carraro

Brito

et al. 2016

ArqVet

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Geraldo Tadeu dos Santos 5 BÁNKUTI, F. I.; CARRARO, J.; BRITO, M. M. de; POZZA, M. S. dos S.; SANTOS, G. T. dos. Práticas de higiene e a qualidade do leite: uma análise a partir da técnica de clusters. Arq. Ciênc. Vet. Zool. UNIPAR, Umuarama, v. 19, n. 1, p. 17-21, jan./mar. 2016. RESUMO:O objetivo proposto neste artigo foi demonstrar a viabilidade do uso da técnica de formação de clusters hierárqui-cos para analisar a relação entre as práticas de manejo e higiene de ordenha e suas implicações para a qualidade do leite. Foi desenvolvida pesquisa a campo e realizada coleta de dados referente a qualidade do leite de produtores da Região de Mococa, SP. A partir dessas, 455 casos foram submetidos à análise de cluster hierárquico. Dois grupos foram definidos, o primeiro, (grupo 1) caracterizado por produtores com baixa aplicação de práticas de manejo e higiene de ordenha e o segundo (grupo 2), por produtores com elevada aplicação dessas práticas. Entre os grupos, foi aplicado teste de hipóteses para comparação de diferenças percentuais entre as variáveis de manejo e higiene de ordenha. Em etapa subsequente foi feita análise descritiva e de verificação de igualdade entre os grupos, segundo variáveis de qualidade do leite. A técnica de formação de clusters hierárquicos mostrou-se adequada para análise da relação entre práticas de manejo e higiene de ordenha. Produtores rurais que adotam com maior frequência tais práticas, obtém leite de melhor qualidade. PALAVRAS-CHAVE: Aglomerados. Análise multivariada. Sistema agroindustrial. HYGIENE PRACTICES AND MILK QUALITY: AN ANALYSIS FROM THE CLUSTER TECHNIQUEABSTRACT: The aim of this paper was to demonstrate the feasibility of using the hierarchical clusters technique to analyze the relationship between management practices and milking hygiene and the implications on milk quality. A field research was developed and carried out to collect data regarding the quality of milk produced in a dairy cooperative located in Mococa, SP. From these, 455 cases were submitted to the hierarchical cluster analysis. Two groups were defined, the first one (group 1) contained producers with low application management practices and milking hygiene, while the second one (group 2) of producers with high application of these practices. The hypothesis test was applied between the groups to compare the percentage differences between management variables and hygienic milking. Subsequently, a descriptive analysis was performed and the equality between groups was checked against milk quality variables. The hierarchical cluster formation technique was adequate for analyzing the relationship between management practices and milking hygiene. Farmers who more often adopt these practices provide better quality milk. KEYWORDS: Agribusiness system. Clusters. Multivariate analysis. PRÁCTICAS DE HIGIENE Y LA CALIDAD DE LA LECHE: UN ANÁLISIS DESDE LA TÉCNICA DE CLUSTERS RESUMEN:El objetivo propuesto en este artículo ha sido demostrar la viabilidad de uso de la técnica de formación de clusters jerárquicos, para an...

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Section: Resultsunclassified

“…A contagem de células somáticas é influenciada por vários fatores, como idade do animal, época do ano, manejo e nutrição (CUNHA et al, 2008 …”

Section: Resultsunclassified

Práticas De Higiene E a Qualidade Do Leite: Uma Análise a Partir Da Técnica De Clusters

Bánkuti

Carraro

Brito

et al. 2016

ArqVet

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“…According to Cunha et al (2008), lactose is the milk component with the highest osmotic capacity. Different results were observed by Corrêa (2010), who reported that the lactose percentage in milk was higher in the first and second lactation, keeping constant from the third to the seventh lactation, and decreasing with increasing delivery orders of calving and the lowest point is in the ninth lactation.…”

Section: Resultsmentioning

confidence: 99%

“…SCC indicates inflammation of the mammary gland, in the majority of cases resulting from bacterial infection (Cunha et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

Influence of lactation stage, delivery order of calving and genetic group on milk quality

Carmo¹,

Silva²,

Pereira³

et al. 2015

Afr. J. Agric. Res.

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Milk production and quality are influenced by environmental factors such as nutrition, genetic factors such as breed and physiological. The aim of the present study was to evaluate the influence of lactation stage, delivery order and genetic group on the quality of milk from crossbred cows 3/4 Gyr, 7/8 Gyr and 15/16 Gyr. Fresh milk samples were collected from crossbred cows. Fat, protein, lactose, non fat dry extract (NDE) and somatic cell count (SCC) of milk according to lactation stage, delivery order of calving and genetic groups were evaluated. The experimental design was completely randomized. Tukey test at 5% probability was used. Animals at the final third of lactation (201 to 305 days) showed higher fat, protein, NDE and SCC levels when compared to animals of other lactation stages. First delivery animals produced milk with higher content of solids compared to animals with 2 deliveries and above three deliveries. First calving the animals produced milk with higher solids content compared to animals with two calving and above three calving. Fat, protein and NDE results of fresh milk were consistent with limits established by the Brazilian legislation for milk quality, regardless of lactation stage, delivery order of calving and genetic group. Milk SCC was higher in cows in advanced lactation stage, The results were however below limits required by law. 3/4 crossbred Gyr cows showed higher SCC, with average values above limit established by current legislation.

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“…Several factors might influence the SCC variation, being mentioned parturition order, lactation period, month and season of the year (Laevens et al 1997, Schepers et al 1997, Cunha et al 2008. However, the occurrence of intramammary infection is the main factor responsible for the SCC variation (Harmon 1994).…”

Section: Discussionmentioning

confidence: 99%

Risk factors associated with buffalo mastitis in the Brazilian Northeast

et al. 2011

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Risk factors for subclinical mastitis were studied in 474 buffaloes cows proceeding from four dairy farms located in the states of Pernambuco, Alagoas, Bahia and Ceará, Brazil. Milk samples (n=1896) of lactating buffaloes cows were examined for somatic cells count (SCC) and microbiologic exam, and a questionnaire composed by objective questions was applied in order to obtain animals and herd management data. Risk factors analysis was performed in two stages: univariate and mutivariate analysis. Two analysis were performed, one considering the animal classification for SCC as the dependent variable (<400,000 -negative; >400,000 -positive) and another, considering the microbiologic exam result (positive and negative). In the multivariate analysis considering SCC as dependent variable, the lack of teat washing was the only variable identified as a risk factor, so that farms without this procedure before the milking presented risk of infection of 2.68 (I.C. 1.49-4.83). In the multivariate analysis considering the microbiologic exam as dependent variable, it was observed that properties that performed the cleaning of the milking equipment manually presented risk of 1.85 (I.CI. 1.32-3.64), which was higher than those properties that performed the cleaning mechanically (p=0.019). Risk factors for the occurrence of subclinical mastitis in dairy buffaloes in Brazilian Northeast farms were related to the characteristics of improper milking management. Risk factors identified in this study must be carefully corrected in order to reduce the frequency of mastitis cases, and therefore, contribute for disease control and prevention in the herds. RESUMO.-[Fatores de risco associados à mastite bubalina no Nordeste brasileiro.]Foram estudados os fatores de risco para mastite subclínica em 474 búfalas procedentes de quatro propriedades de exploração leiteira situadas nos Estados de Pernambuco, Alagoas, Bahia e Ceará. Amostras de leite (n=1896) de búfalas em lactação foram examinadas para contagem de células somáticas (CCS) e exame microbiológico, e um questionário constituído de perguntas objetivas foi aplicado para obtenção de dados dos animais e do manejo do rebanho. A análise dos fatores de risco foi efetuada em duas eta-pas: análise univariada e multivariada. Foram realizadas duas análises, uma considerando a classificação dos animais quanto à CCS como variável dependente (<400.000 -negativo; > 400.000 -positivo) e outra considerando o resultado do exame microbiológico (positivo e negativo). Na análise multivariada consiPesq. Vet. Bras. 31(6):499-504, junho 2011 Elizabeth Sampaio de Medeiros et al. 500 derando-se a CCS como variável dependente a única variá-vel identificada como fator de risco foi não lavar os tetos antes da ordenha, onde aquelas propriedades que não lavavam os tetos antes da ordenha apresentaram o risco de infecção de 2,68 (I.C. 1,49-4,83). Na análise multivariada considerando o microbiológico como variável dependente constatou-se que aquelas propriedades que realizavam limpeza manual do equipamento de o...

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Mastite subclínica e relação da contagem de células somáticas com número de lactações, produção e composição química do leite em vacas da raça Holandesa

Cited by 54 publications

References 8 publications

Práticas De Higiene E a Qualidade Do Leite: Uma Análise a Partir Da Técnica De Clusters

Práticas De Higiene E a Qualidade Do Leite: Uma Análise a Partir Da Técnica De Clusters

Influence of lactation stage, delivery order of calving and genetic group on milk quality

Risk factors associated with buffalo mastitis in the Brazilian Northeast

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