Pathogen effects on milk yield and composition in chronic subclinical mastitis in dairy cows

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorWageningen University-
Autor(es): dc.contributorUtrecht University-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorNorth Carolina State University-
Autor(es): dc.creatorGonçalves, J. L.-
Autor(es): dc.creatorKamphuis, C.-
Autor(es): dc.creatorVernooij, H.-
Autor(es): dc.creatorAraújo, J. P. [UNESP]-
Autor(es): dc.creatorGrenfell, R. C.-
Autor(es): dc.creatorJuliano, L.-
Autor(es): dc.creatorAnderson, K. L.-
Autor(es): dc.creatorHogeveen, H.-
Autor(es): dc.creatordos Santos, M. V.-
Data de aceite: dc.date.accessioned2022-02-22T00:26:44Z-
Data de disponibilização: dc.date.available2022-02-22T00:26:44Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.tvjl.2020.105473-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/199205-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/199205-
Descrição: dc.descriptionThis study aimed to evaluate the effects of chronic subclinical mastitis (CSM) on milk production and component yields in dairy cows. A total of six herds located in the Midwest area of São Paulo State, Brazil were selected. Herds were visited once every 2 weeks to measure milk yield and to collect milk samples from lactating Holstein cows. Milk samples were collected at two stages (1 and 2), and each stage comprised three milk samplings. In stage 1, a total of 117 of 647 cows were diagnosed with CSM based on at least two of three repeated somatic cell counts (SCC) > 2000,000 cells/mL and positive bacterial milk culture results (BC). Cows with CSM were selected for the second stage. In stage 2, selected cows had quarter sampling aseptically collected for BC analyses prior to milking, and quarter milk yield was measured. Milk components (total protein, fat, lactose, and total solids) were measured using mid-infrared spectroscopy. Mammary quarters were considered healthy if all three repeated SCC results were ≤ 200,000 cells/mL and no bacterial growth was detected on BC. All quarters with positive bacterial growth were classified as having (non-chronic) subclinical mastitis when only one of three SCC results were > 200,000 cells/mL, and CSM when at least two of three SCC results were > 200,000 cells/mL. The effects of CSM by type of pathogen on milk and components yield were assessed using a linear mixed model. Mammary quarters with CSM caused by major pathogens had milk loss of 1.1 kg/quarter milking in comparison to healthy quarters. Milk losses were 0.8 and 1.3 kg/quarter milking when CSM was caused by Staphylococcus aureus or environmental streptococci, respectively. In addition, healthy quarters produced more milk components than quarters with CSM caused by major pathogens. Minor pathogens causing CSM (non-aureus staphylococci and Corynebacterium spp.) had no effect on milk yield. Quarters with CSM had lower milk and component yields when compared with healthy quarters. Milk losses varied according to the type of pathogen and were higher when associated with major pathogens such as S. aureus and environmental streptococci compared with healthy quarters.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionDepartment of Animal Sciences School of Veterinary Medicine and Animal Sciences University of São Paulo (USP)-
Descrição: dc.descriptionBusiness Economics Group Wageningen University, Hollandseweg 1-
Descrição: dc.descriptionDepartment of Farm Animal Health Utrecht University, Yalelaan 7-
Descrição: dc.descriptionInstitute of Biosciences ‘Júlio de Mesquita Filho’ State University of São Paulo (UNESP)-
Descrição: dc.descriptionDepartment of Biophysics Federal University of São Paulo (UNIFESP)-
Descrição: dc.descriptionDepartment of Population Health and Pathobiology College of Veterinary Medicine North Carolina State University-
Descrição: dc.descriptionInstitute of Biosciences ‘Júlio de Mesquita Filho’ State University of São Paulo (UNESP)-
Descrição: dc.descriptionFAPESP: 2013/07914-8-
Descrição: dc.descriptionFAPESP: 2013/23613-8-
Descrição: dc.descriptionFAPESP: 2014/17411-6-
Descrição: dc.descriptionFAPESP: 2015/04570-1-
Idioma: dc.languageen-
Relação: dc.relationVeterinary Journal-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectChronic mastitis-
Palavras-chave: dc.subjectMALDI-TOF MS-
Palavras-chave: dc.subjectMilk component alteration-
Palavras-chave: dc.subjectMilk loss-
Palavras-chave: dc.subjectRepeated episode-
Título: dc.titlePathogen effects on milk yield and composition in chronic subclinical mastitis in dairy cows-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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