Características Físico-Químicas E Celularidade Do Leite De Ovelhas Santa Inês Em Diferentes Estágios De Lactação

Blagitz, Maiara Garcia; Batista, Camila Freitas; Gomes, Viviani; Souza, Fernando Nogueira de; Libera, Alice Maria Melville Paiva Della

doi:10.5216/cab.v14i4.14028

Cited by 3 publications

(1 citation statement)

References 44 publications

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“…The SCC, on the other hand, is an indicator of mammary gland health in cows and sheep (Spanu et al 2011) and can be used to monitor prevalence of subclinical mastitis (Sharma et al 2011). The SCC in sheep milk covers different cellular elements, such as leukocytes and epithelial cells (Blagitz et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of subclinical mastitis in Santa Inês and Morada Nova sheep in southeastern Brazil

Zafalon

Santana

Pilon

et al. 2016

Trop Anim Health Prod

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The objective of this study was to evaluate different screening limits for the California mastitis test (CMT) and the somatic cell count (SCC) in previous diagnoses of subclinical mastitis in Santa Inês and Morada Nova ewes, which were reared under the same management conditions. Additionally, cutoff points were defined for SCC in accordance with the sensitivity and specificity of the test. A total of 907 mammary halves were subjected to CMT and SCC. The disease was confirmed by means of microbiological identification. Coagulase-negative staphylococci (CNS) were the microorganisms with highest occurrence. The CMT score of 1+ provided adequate sensitivity and specificity at all periods of lactation investigated. This score showed good agreement with SCC, >400,000 cells mL(-1). Higher cell counts favored higher diagnostic specificity. They can be used when producers have financial difficulties relating to treatment or culling of sheep with subclinical mastitis. However, producers should be warned about the risk of false-negative results in the flock.

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Section: Introductionmentioning

confidence: 99%

Diagnosis of subclinical mastitis in Santa Inês and Morada Nova sheep in southeastern Brazil

Zafalon

Santana

Pilon

et al. 2016

Trop Anim Health Prod

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Produção e composição do leite de ovelhas da raça Rabo Largo criadas em região tropical

Vasconcelos

Carvalho

Costa³

et al. 2017

Rev. bras. saúde prod. anim.

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RESUMO Objetivou-se quantificar a produção e a composição química do leite das ovelhas Rabo Largo mantidas sob dois sistemas de alimentação durante a fase lactacional. Foram utilizadas 60 ovelhas, primíparas e multíparas entre um e quatro anos de idade, amamentando um ou dois cordeiros, mantidas sob dois sistemas de alimentação, com peso vivo médio inicial de 43 kg e 40,5 kg para o lote suplementado e lote não suplementado, respectivamente. Foi medida a produção de leite semanalmente, através do método indireto da dupla pesagem, após o período do colostro. Foram coletadas também amostras do leite, a cada semana, para a determinação da composição química. Os dados de produção de leite foram analisados como medidas repetidas no tempo e entre grupo de fatores. Os fatores considerados foram ano e períodos chuvoso e seco no início de lactação, ordem de lactação, interação tipo de parto e sexo das crias e entre os lotes. Para efeito de comparação de médias entre os lotes, utilizou-se o teste de média dos mínimos quadrados com nível de significância de 5%. Verificou-se que o lote suplementado obteve maior produção de leite do que o lote não suplementado, exceto nas duas últimas semanas de lactação. O pico de produção ocorreu durante a segunda semana de lactação para ambos os lotes. As ovelhas da raça Rabo Largo sem acesso a suplementação responderam de maneira positiva expressando adaptabilidade as condições semiáridas com potencial leiteiro semelhante a outras raças ovinas, e quando suplementadas obtém-se maior produção e manutenção dos mais elevados níveis dos componentes químicos do leite na última semana de lactação.

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Supplementation strategies and their effects on ewes colostrum and milk compositions in the initial third lactation period

Campos

Difante

Rangel

et al. 2019

SCA

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The objective of this study was to analyze colostrum and milk compositions of ewes kept in pasture receiving different types/levels of supplementation and to analyze milk composition variation throughout the initial third lactation period. After confirmation of pregnancy, 54 ewes were kept in pasture and supplemented from the final third of gestation until weaning with multiple mixture or concentrate (0.4% or 0.8% of body weight). Milk collections were carried out in the postpartum period to collect colostrum (day 0), and on the seventh, 14th, 21st and 28th milking days. Samples were obtained by manual milking and analyzed for protein, fat, casein, lactose, total solids and defatted dry extract. No effects from the different types of supplementation were observed on the colostrum composition or in relation to milk composition. An effect of supplementation was only found for lactose contents, which were higher for animals that consumed a higher level of supplementation. In relation to the milking days, a linear decrease in protein, casein, total solids and defatted dry extract contents was observed between the seventh and the 28th day of lactation. No interaction between type of supplementation and the milking days was observed. The different types of supplementation did not alter the colostrum composition of Santa Inês crossbred ewes, however they had an influence on milk composition. Protein, casein, total solids and defatted dry extract decrease linearly between the seventh and the 28th day of lactation.

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Características Físico-Químicas E Celularidade Do Leite De Ovelhas Santa Inês Em Diferentes Estágios De Lactação

Cited by 3 publications

References 44 publications

Diagnosis of subclinical mastitis in Santa Inês and Morada Nova sheep in southeastern Brazil

Diagnosis of subclinical mastitis in Santa Inês and Morada Nova sheep in southeastern Brazil

Produção e composição do leite de ovelhas da raça Rabo Largo criadas em região tropical

Supplementation strategies and their effects on ewes colostrum and milk compositions in the initial third lactation period

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