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Effect of subtherapeutic concentrations of tylosin on the inhibitory stringency of a mixed anaerobe continuous‐flow culture of chicken microflora against Escherichia coli O157:H7

Aims: The aim of this study was twofold: first to determine the effect of subtherapeutic concentrations of tylosin, a macrolide antibiotic used for growth promotion, on a mixed anaerobic continuous‐flow fermentation culture of chicken gastrointestinal microorganisms (CCF) and secondly, to determine if these concentrations would allow persistence of Escherichia coli O157:H7 in CCF.