Influence of lactation stages and rain periods on subclinical mastitis in meat producing ewes

Zafalon, L. F.; Júnior, Guilherme Aparecido Fim; Vaso, Carolina Orlando; Lopes, Nahryda Samara dos Santos; Veschi, J. L. A.; Santana, R. C. M.

doi:10.1590/0103-8478cr20151068

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Hence, inference of SCC and milk composition parameters should be made in consideration of these limitations. The SCC cut-off point to indicate mammary infection in ewes has been reported to range from 300,000 to 1,000,000 [46], indicating a lack of consensus [47]. The present study found milk SCC was not different between defective and normal categories, as some individual udder halves in both categories were observed to have high SCC (i.e., more than one million).…”

Section: Discussioncontrasting

confidence: 48%

Effect of Palpable Udder Defects on Milk Yield, Somatic Cell Count, and Milk Composition in Non-Dairy Ewes

Zeleke

Kenyon

Flay

et al. 2021

Animals

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In non-dairy ewes, udder defects hinder the survival and weight gain of their pre-weaned lambs. The objectives of this study were to determine the effects of palpable udder defects on milk yield, somatic cell count (SCC), and milk composition in non-dairy Romney ewes. Ewes with a history of udder defects or normal udders were selected for the study. Of a total of 48 ewes that lambed, 30 ewes reared at least one lamb, and were milked six times, once weekly, for the first six weeks of lactation. Udder halves were palpated and scored at each milking event. Multivariate linear mixed models examined the impacts of udder defects on udder-half and whole-udder milk yield, SCC, and milk composition (fat, protein, lactose, total solids, and solids non-fat (SNF)). Across the six examinations, 24.7% of the total 352 udder-half examinations were observed to be defective. Udder halves that were defective at least once produced on average 57.9% less (p < 0.05) milk than normal udder halves, while normal udder halves with a contralateral defective half yielded 33.5% more (p < 0.05) milk than normal udder halves. Successive occurrence of both hard and lump udder defect categories in an udder-half, udder defect detection early in lactation, and a high frequency of udder defect detection were all associated with udder-half milk yield loss (p < 0.05). At the whole-udder level, no differences in milk yield (p > 0.05) were observed between those with one udder-half defective and both normal udder-halves. However, udders in which one udder half was categorised as hard but progressed to lump and remained as lump until 42 days of lactation produced less (p < 0.05) milk compared with normal udders. With the exception of SNF, there were no significant associations (p > 0.05) between milk composition parameters and udder defect. Overall, these findings emphasise the importance of udder health in non-dairy ewes and the potential effect of udder defects on their lambs.

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Section: Discussioncontrasting

confidence: 48%

Effect of Palpable Udder Defects on Milk Yield, Somatic Cell Count, and Milk Composition in Non-Dairy Ewes

Zeleke

Kenyon

Flay

et al. 2021

Animals

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“…Zafalon et al (2015) utilizando 160 ovelhas, observou que 63 mamas estavam acometidas por mastite subclínica. Zafalon et al (2016) utilizando 479 ovelhas Santa Inês e 342 Morada nova, totalizando 821 metades, observou que 55,8% das partes apresentavam mastite subclínica.…”

Section: Mastite Subclínicaunclassified

Avaliação Da Prevalência De Mastite Subclínica Em Ovelhas

Silva¹,

Akashi²,

Tironi³

et al. 2019

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RESUMO A ovinocultura encontra-se em constante crescimento mundialmente. Nessa atividade, a mastite é uma das enfermidades que acometem as ovelhas, gerando desmame de cordeiros leves, ou até mesmo a perda definitiva da função da glândula mamária. Sendo assim, seu diagnóstico deve ser precoce, evitando-se essas perdas na produção. Nesse estudo, foram avaliadas 413 ovelhas, destas 300 se apresentavam lactantes e foram inseridas nas avaliações. Para isso, foram coletados 2mL de amostra de leite de cada glândula mamária e adicionados 2mL de reagente do California Mastitis Test (CMT). Após homogeneização, a reação foi interpretada, considerando-se 5 graus de aglutinação: (-) sem alteração de consistência, (+) presença de gel ou formas espessas de lodo, mas sem mobilidade, (++) forma espessa de gel grumoso, com movimentação em direção ao centro, (+++) formas de gel distintas com adesão à parte inferior da raquete para CMT e (MC: mastite clínica) consistência grumosa, mesmo sem adição do reagente. O objetivo desse estudo foi realizar um levantamento da prevalência de mastite subclínica em ovelhas na região metropolitana de Umuarama-PR. Das propriedades avaliadas, 90% continha animais positivos. Dentre os animais avaliados, 55,6% apresentaramse positivos no teste, com uma variação de 0 a 90,4% entre as propriedades. Quanto à mastite clínica, houve incidência de 2 a 34% de acometimento dos animais entre as propriedades. Sendo assim, conclui-se que a mastite clínica e subclínica são enfermidades de grande acometimento dos animais presentes nas propriedades de criação dessa espécie.

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Risk factors for intramammary infection in meat- and pelt producing ewes with clinically healthy udders

Persson

Gustafsson

Hoffman

et al. 2022

Small Ruminant Research

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Influence of lactation stages and rain periods on subclinical mastitis in meat producing ewes

Abstract: Mastitis negatively influences the survival and weight gain of ovines for meat production. The purpose of this study was to investigate, in sheep for meat production, the occurrence of subclinical mastitis in ewes at the end of lactation and beginning

Cited by 3 publications

References 11 publications

Effect of Palpable Udder Defects on Milk Yield, Somatic Cell Count, and Milk Composition in Non-Dairy Ewes

Effect of Palpable Udder Defects on Milk Yield, Somatic Cell Count, and Milk Composition in Non-Dairy Ewes

Avaliação Da Prevalência De Mastite Subclínica Em Ovelhas

Risk factors for intramammary infection in meat- and pelt producing ewes with clinically healthy udders

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