Document Detail

The effect of intramammary antibiotic therapy at calving on udder health traits.
MedLine Citation:
PMID:  2444634     Owner:  NLM     Status:  MEDLINE    
The effect of intramammary antibiotic therapy at calving on mastitis infection prevalence, linear score milk somatic cell count, and milk NAGase activity, 30 d postpartum, and on milk production, 90 to 120 d postpartum, was tested. Cows (n = 175) were split into treatment and control groups at drying off. All cows received commercial dry cow therapy. At calving, treated cows received commercial lactating cow therapy in all quarters after the first two milkings; control cows were not treated. Composite milk samples were aseptically collected from all cows at drying off, calving, and 30 d postpartum. Udder health traits: linear score milk SCC, NAGase activity, and bacterial content in milk, were determined on all samples. The first three DHI milk weights were recorded for all cows. Treatment and control cows had similar prevalences of intramammary infections during the dry and 30-d postpartum periods. Least squares means of linear score milk SCC and NAGase activities were similar at drying off and calving. Cell count scores were similar between groups; NAGase activities were higher in control cows at 30 d postpartum. Control cows tended to produce more milk postpartum. Results demonstrated no advantage of intramammary therapy at calving in improving milk production or udder health.
L K Fox; D D Hancock; C W Weems; W Toma; E Chang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of dairy science     Volume:  70     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1987 Aug 
Date Detail:
Created Date:  1987-11-23     Completed Date:  1987-11-23     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1696-700     Citation Subset:  IM    
Department of Animal Science, University of Hawaii, Honolulu 96822.
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MeSH Terms
Acetylglucosaminidase / metabolism
Dihydrostreptomycin Sulfate / administration & dosage,  therapeutic use*
Mastitis, Bovine / drug therapy*
Milk / cytology,  enzymology
Penicillins / administration & dosage,  therapeutic use*
Postpartum Period*
Reg. No./Substance:
0/Penicillins; 3511-16-8/hetacillin; 5490-27-7/Dihydrostreptomycin Sulfate; EC

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

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