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dc.contributor.author Friggens, N. C.
dc.contributor.author Dewhurst, Richard J.
dc.contributor.author Ingvartsen, K. L.
dc.date.accessioned 2009-12-08T13:12:06Z
dc.date.available 2009-12-08T13:12:06Z
dc.date.issued 2003
dc.identifier.citation Friggens , N C , Dewhurst , R J & Ingvartsen , K L 2003 , ' On the relationship between lactational performance and health: is it yield or metabolic imbalance that causes production diseases in dairy cattle? A position paper ' Livestock Production Science , vol 83 , no. 2-3 , pp. 2-3 . , 10.1016/S0301-6226(03)00110-6 en
dc.identifier.issn 0301-6226
dc.identifier.other PURE: 138195
dc.identifier.other dspace: 2160/3791
dc.identifier.uri http://hdl.handle.net/2160/3791
dc.description Ingvartsen, K. L., Dewhurst, R. J., Friggens, N. C. (2003). On the relationship between lactational performance and health: is it yield or metabolic imbalance that causes production diseases in dairy cattle? A position paper.  Livestock Production Science, 83, (2-3), 277-308. en
dc.description.abstract The objective of this review was to explore the relationship between lactational performance and health. We focused on lactational incidence rates (LIR) of the production diseases that are of economic importance to the dairy industry. Based on a review of 11 epidemiological and 14 genetic studies we found little evidence that high yielding cows have increased risk of dystocia, retained placenta, metritis and left-displaced abomasum. Results for periparturient paresis were inconsistent. Whilst we found no phenotypical relationship between milk yield and the risk of ketosis and lameness, selection for higher milk yields will probably increase LIR for these diseases. Mastitis was the only disease where there was a clear relationship between milk yield and risk of infection. Continued selection for higher milk yields will worsen this situation. However, our overall conclusion is that reviewing existing literature, even with a structured literature selection, is inadequate to the task of elucidating the relationship between lactational performance and risk of production diseases. There are substantial problems with confounding effects and unaccounted for biological correlations. In the second part of the review we argue towards a common basis for addressing production diseases. We propose abnormal body mobilisation and immune competence as common currencies for metabolic and immune status and argue for the development of indicators of metabolic imbalance and the early development of diseases. Furthermore, we suggest the use of indicators of ‘imbalance’ to guide feeding according to the needs of individual cows with their specific genotype and management history. We believe that this approach has the potential to provide new diagnostic and decision support tools to improve animal health and reproduction, whilst simultaneously maintaining optimal production and efficiency. Further research is needed to identify and validate new indicators and individual feeding strategies. en
dc.format.extent 2 en
dc.language.iso eng
dc.relation.ispartof Livestock Production Science en
dc.subject Production diseases en
dc.subject Lactational performance en
dc.subject Physiological status en
dc.subject Immune competence en
dc.subject Metabolic imbalance en
dc.subject Indicators en
dc.subject Individual variation en
dc.subject Individual feeding strategies en
dc.title On the relationship between lactational performance and health: is it yield or metabolic imbalance that causes production diseases in dairy cattle? A position paper en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1016/S0301-6226(03)00110-6
dc.contributor.institution Aberystwyth University en
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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