Author:
DUNLOP R. H.,McEWEN S. A.,MEEK A. H.,FRIENDSHIP R. M.,BLACK W. D.,CLARKE R. C.
Abstract
The objective of this study was to determine the most efficient means of sampling faeces of
finisher pigs for accurate and precise farm-level estimates of antimicrobial resistance among
faecal Escherichia coli. Resistance to tetracycline and gentamicin of 8250 isolates of E. coli
from 55 finisher pigs on one farm was measured with a hydrophobic grid membrane filter
method. The between-pig, within-pen component of variance in resistance was large (97·5%),
while between-pen, within-room and between-room components were small (2·5% and 0%,
respectively). Using these resistance data, the abilities of two sampling strategies to estimate
prevalence were modelled with a Monte Carlo ‘bootstrap’ procedure. Compositing faecal
samples from several pigs before testing produced unbiased and precise estimates of prevalence
and is simpler technically than individual animal testing.
Publisher
Cambridge University Press (CUP)
Subject
Infectious Diseases,Epidemiology
Cited by
29 articles.
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