Abstract

High frequencies of antimicrobial drug resistance were observed in O157 and non-O157 Shiga toxin–producing E. coli strains recovered from patients in Michigan during 2010–2014. Resistance was more common in non-O157 strains and independently associated with hospitalization, indicating that resistance could contribute to more severe disease outcomes.

Highlights

  • High frequencies of antimicrobial drug resistance were observed in O157 and non-O157 Shiga toxin–producing E. coli strains recovered from patients in Michigan during 2010–2014

  • Most infections are caused by O157 strains; non-O157 Shiga toxin–producing Escherichia coli (STEC) infections have increased [2]

  • Given the importance of resistance in E. coli pathotypes, we sought to determine the prevalence of resistant STEC infections and assess the effects of resistance on disease

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Summary

Introduction

High frequencies of antimicrobial drug resistance were observed in O157 and non-O157 Shiga toxin–producing E. coli strains recovered from patients in Michigan during 2010–2014. Most infections are caused by O157 strains; non-O157 STEC infections have increased [2]. We obtained 358 STEC isolates from the Michigan Department of Health and Human Services (MDHHS) Reference Laboratory (Lansing, MI, USA), collected during 2010–2014.

Results
Conclusion

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