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Pig Journal Volume: 64
Publication date: February 2011

Short Communications

AN UPDATE ON ANTIMICROBIAL SENSITIVITY TESTING FOR PORCINE E. COLI AND SALMONELLA ISOLATES INCLUDING RESULTS FROM THE UK ARCHIVE WITH PARTICULAR EMPHASIS ON COLISTIN (POLYMIXIN E)
B.W. STRUGNELL

Abstract
Concerns that antimicrobial resistance in bacterial isolates of animal originmay lead to similar resistance in bacterial isolates of human health significance have been raised for several years (de Jong et al.,2009).Thiswas highlighted by a recent intervention of the ChiefMedicalOfficer,who stated that fluoroquinolones and third/fourth generation cephalosporins should bewithdrawn fromuse in animals (Donaldson, 2008).Attention often focuses on the pig and poultry industries in this regard as high throughputs and relatively intensive production sometimesmeans that levels of antimicrobial use exceed those for other sectors.A recent British VeterinaryAssociation (BVA) poster sets out the practical guidelines for dealingwith these concerns (Anon, 2009).

Enterobacteriacae are among the bacterial species commonly reported as showing antimicrobial resistance, and twomembers of this group, Escherichia coli and salmonella, are frequently targeted for therapeutic use of antimicrobials on UK pig units. This paper was, therefore, intended to give an update on the position, based on a review of literature and results of antimicrobial sensitivity testing on a sample of E. coli isolates associated with porcine enteric disease.

 
 
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