Effect of antimicrobial use on the resistance of Escherichia coli in faecal flora of pigs

Date
2007-01-01
Authors
Belloc, C.
Dinh, N.
Lezé, V.
Beaudeau, F.
Creignou-Péron, V.
Laval, A.
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Abstract

The antimicrobial use in veterinary medicine is of concern because of possible transmisston of resistant bacteria to humans. However the relation between use and occurrence of resistance is poorly documented in the field. Sixteen farrow-to-fimsh herds were selected and classified on the frequency of antimicrobial administrations (low (LU), medium (MU) and high (HU) users). lndtcative Eschenchia coli strains were tsolated from faeces of sows (5 per herd) and young pigs (3 per sow) at several ttmes during animals' hfe and tested for reststance to amoxicillin, gentamicin, trimethoprim-sulfamids and tetracyclin. The percentages of resistant strams were compared between herd groups.

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