Document Detail


Relationship of milk proteins in blood with somatic cell counts in milk of dairy cows.
MedLine Citation:
PMID:  3286699     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Intramammary leucocytosis was induced by injection of Escherichia coli endotoxin via the teat canal in three lactating Holstein cows. Concentrations of alpha-lactalbumin and casein in blood serum were measured, and somatic cell concentration and yield and composition of milk were determined. Endotoxin injection elicited mean increases of 100-fold in somatic cell concentration and 50% in protein concentration, whereas milk yield declined 5-fold and lactose concentration was halved. Concentrations of alpha-lactalbumin and casein in blood rose from 80 to 1909 and 0 to 1231 ng/ml, respectively. By 96 h postinjection, all variables were approximately equal to those preinjection. In a second study, concentration of alpha-lactalbumin was determined in blood of lactating cows in two herds (n = 332) and related to milk somatic cell count. Concentrations of alpha-lactalbumin in blood were correlated with somatic cell counts (r = .60). Mean concentrations of alpha-lactalbumin increased with increasing cell count even at low somatic cell concentrations (25 to 250 X 10(3)). Concentrations of milk proteins in blood serum apparently reflect competency of the blood-milk barrier and may therefore yield an indirect measure of udder health.
Authors:
T B McFadden; R M Akers; A V Capuco
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of dairy science     Volume:  71     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1988 Mar 
Date Detail:
Created Date:  1988-07-12     Completed Date:  1988-07-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  826-34     Citation Subset:  IM    
Affiliation:
Department of Dairy Science, Virginia Polytechnic Institute and State University, Blacksburg 24061.
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MeSH Terms
Descriptor/Qualifier:
Animals
Caseins / blood
Cattle / blood,  physiology*
Endotoxins / pharmacology*
Escherichia coli*
Female
Lactalbumin / blood
Lactation / blood,  physiology*
Leukocytes / immunology
Mammary Glands, Animal / cytology,  drug effects
Milk / cytology*,  drug effects
Milk Proteins / blood*
Pregnancy
Radioimmunoassay
Chemical
Reg. No./Substance:
0/Caseins; 0/Endotoxins; 0/Milk Proteins; 9013-90-5/Lactalbumin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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