Quantitative analysis of antibiotic usage in British sheep flocks
- Davies, Peers
- Remnant, John G.
- Green, Martin J.
- Gascoigne, Emily
- Gibbon, Nick
- Hyde, Robert
- Porteous, Jack R.
- Schubert, Kiera
- Lovatt, Fiona
- Corbishley, Alexander
DOIAbstract
The aim of this study was to examine the variation in antibiotic usage between 207 commercial sheep flocks using their veterinary practice prescribing records. Mean and median prescribed mass per population corrected unit (mg/PCU) was 11.38 and 5.95, respectively and closely correlated with animal defined daily dose (ADDD) 1.47 (mean), 0.74 (median) (R2=0.84, P<0.001). This is low in comparison with the suggested target (an average across all the UK livestock sectors) of 50 mg/PCU. In total, 80 per cent of all antibiotic usage occurred in the 39 per cent of flocks where per animal usage was greater than 9.0 mg/PCU. Parenteral antibiotics, principally oxytetracycline, represented 82 per cent of the total prescribed mass, 65.5 per cent of ant...
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