OBSERVATIONS ON THE EFFECTS OF LONG-TERM WITHDRAWAL ON CARCASS COMPOSITION AND RESIDUE CONCENTRATIONS IN CLENBUTEROL-MEDICATED CATTLE

Christopher Elliott, Joan Crooks, Joanne McEvoy, Derek McCaughey, Margaret Hewitt, Diana Patterson, David Kilpatrick

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

The detection of the illegal use of clenbuterol (CBL) as a growth promoter has relied on detecting residual concentrations of the drug in body fluids or tissues. Analysis of retinal extracts has recently been shown to considerably extend the detection period following withdrawal. The withdrawal periods required to eliminate residues from the liver and retina were investigated by medicating 20 cattle with CBL for 30 days; 6 control animals remained unmedicated. Residual concentrations were monitored throughout this period and for the subsequent 140 days. Concurrent changes in muscle areas and backfat thicknesses were recorded by ultrasound.
Original languageEnglish
Pages (from-to)459-468
Number of pages10
JournalVeterinary Research Communications
Volume17
Publication statusPublished - 1993

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