| The effect of intramammary antibiotic therapy at calving on udder health traits. | |
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MedLine Citation:
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PMID: 2444634 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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L K Fox; D D Hancock; C W Weems; W Toma; E Chang |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Journal of dairy science Volume: 70 ISSN: 0022-0302 ISO Abbreviation: J. Dairy Sci. Publication Date: 1987 Aug |
Date Detail:
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Created Date: 1987-11-23 Completed Date: 1987-11-23 Revised Date: 2007-11-15 |
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: 1696-700 Citation Subset: IM |
Affiliation:
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Department of Animal Science, University of Hawaii, Honolulu 96822. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acetylglucosaminidase
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metabolism Animals Cattle Dihydrostreptomycin Sulfate / administration & dosage, therapeutic use* Female Mastitis, Bovine / drug therapy* Milk / cytology, enzymology Penicillins / administration & dosage, therapeutic use* Postpartum Period* Pregnancy |
| Chemical | |
Reg. No./Substance:
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0/Penicillins; 3511-16-8/hetacillin; 5490-27-7/Dihydrostreptomycin Sulfate; EC 3.2.1.52/Acetylglucosaminidase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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