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Bovine acute mastitis: Effect of sodium salicylate on inflammation

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Title: Bovine acute mastitis: Effect of sodium salicylate on inflammation
Author(s): Morkoc, Amy Carol
Doctoral Committee Chair(s): Spahr, Sidney L.
Department / Program: Health Sciences, Pharmacology
Discipline: Animal Science
Degree Granting Institution: University of Illinois at Urbana-Champaign
Degree: Ph.D.
Genre: Dissertation
Subject(s): Health Sciences, Pharmacology Biology, Veterinary Science Health Sciences, Immunology
Abstract: Experiment 1, 8 cows, was designed to evaluate the effect of sodium salicylate on acute inflammatory responses by means of milk indicators of mastitis, somatic cell count and milk serum albumin, an inflammatory mediator (prostaglandin F$\sb{2\alpha}$), quarter milk yield, and clinical responses, gross udder inflammation, body temperature and appetite change.Experiment 2, 10 cows, was designed to evaluate the long term effect of sodium salicylate on inflammation and milk yield. Milk indicators of mastitis, inflammatory mediator in blood, milk yield and clinical responses were evaluated.Cows treated with sodium salicylate (treatment group) exhibited a change in character of inflammation. Not all changes were considered beneficial. In acute inflammation, Experiment 1, somatic cell count and milk serum albumin were reduced in sodium salicylate-treated cows but only BSA significantly. The inflammatory mediator in blood and lymph, prostaglandin F$\sb{2\alpha}$, was reduced after endotoxin in treatment and control cows, with a significantly lower drop in plasma from cows treated with sodium salicylate. Milk yield was reduced in all quarters, with a greater decrease in sodium salicylate-treated cows, except in the endotoxin-infused quarter. Clinically, the sodium salicylate-treated cows had a minimal increase of body temperature compared to a dramatic increase in control cows. Appetite decline was not significantly different between groups. There was not a significant effect of sodium salicylate on gross inflammation of the udder. Evaluation of data representing PGF$\sb{2\alpha}$ in lymph which demonstrated increased metabolite levels, indicated that production of the inflammatory mediator was local within the mammary gland, in comparison to venous plasma, wherein the increase of PGF$\sb{2\alpha}$ did not appear.In the longer term study (Experiment 2), with samples at longer intervals, results were similar to Experiment 1. With this experimental design, differences in somatic cell count and milk serum albumin were not found. The inflammatory mediator (PGF$\sb{2\alpha}$) measured in jugular plasma was significantly lower in sodium salicylate-treated cows than in controls, but both groups had decreased levels after endotoxin infusion. Gross inflammation was not different between treatment groups. Milk yield declined to a lower level in treated cows. (Abstract shortened with permission of author.)
Issue Date: 1991
Type: Text
Language: English
URI: http://hdl.handle.net/2142/19586
Rights Information: Copyright 1991 Morkoc, Amy Carol
Date Available in IDEALS: 2011-05-07
Identifier in Online Catalog: AAI9124464
OCLC Identifier: (UMI)AAI9124464
 

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