| Short communication: relationships between α-lactalbumin and quality traits in bulk milk. | |
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MedLine Citation:
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PMID: 20854991 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The main objective of this study was to investigate whether the α-lactalbumin (α-LA) content of bulk milk is related with some known inflammatory markers and milk quality traits. An additional objective was to study whether combining α-LA, haptoglobin (Hp), and serum amyloid A (SAA) in an acute phase index (API) could be useful as an alternative marker for bulk milk quality. For the dairy industry, it is of great importance to receive high quality bulk milk for manufacture of liquid milk and dairy products. The somatic cell count (SCC) is currently used as an indirect marker for bulk milk quality, but because it is somewhat insensitive and unspecific, interest exists in alternative markers. Bulk milk samples were analyzed for α-LA, SCC, polymorphonuclear leukocyte count, Hp, SAA, fat, lactose, total protein and casein contents, casein number, protein composition, proteolysis, and coagulating properties. No significant differences were found in SCC, polymorphonuclear leukocyte count, Hp, or SAA between milk samples containing low, medium, or high concentrations of α-LA. Differences between α-LA groups were, however, found in some milk quality traits because high α-LA concentration was related to low concentrations of α(S1)-, α(S2)-, and β-caseins and high concentrations of lactose and β-lactoglobulin. A high API was related to low lactose content and casein number. Samples with high SCC contained less casein and had a lower casein number than milk with a low SCC, and proteolysis was significantly higher in high SCC milk than in low SCC milk. Neither α-LA nor API proved to be a better marker than SCC for the quality traits investigated, and α-LA was not considered to be a useful inflammatory marker in bulk milk. |
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Authors:
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E Wickström; K Persson Waller; H Lindmark-Månsson; A Sternesjö |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of dairy science Volume: 93 ISSN: 1525-3198 ISO Abbreviation: J. Dairy Sci. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-21 Completed Date: 2010-12-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: United States |
Other Details:
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Languages: eng Pagination: 4577-81 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 American Dairy Science Association. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Department of Food Science, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Biological Markers / analysis Cattle Cell Count Female Haptoglobins / analysis Lactalbumin / analysis* Mastitis, Bovine / diagnosis* Milk / chemistry*, standards Quality Control Serum Amyloid A Protein / analysis |
| Chemical | |
Reg. No./Substance:
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0/Biological Markers; 0/Haptoglobins; 0/Serum Amyloid A Protein; 9013-90-5/Lactalbumin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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