Integron-Associated DfrB4, a Previously Uncharacterized Member of the Trimethoprim-Resistant Dihydrofolate Reductase B Family, Is a Clinically Identified Emergent Source of Antibiotic Resistance.

Abstract:

:Whole-genome sequencing of trimethoprim-resistant Escherichia coli clinical isolates identified a member of the trimethoprim-resistant type II dihydrofolate reductase gene family (dfrB). The dfrB4 gene was located within a class I integron flanked by multiple resistance genes. This arrangement was previously reported in a 130.6-kb multiresistance plasmid. The DfrB4 protein conferred a >2,000-fold increased trimethoprim resistance on overexpression in E. coli Our results are consistent with the finding that dfrB4 contributes to clinical trimethoprim resistance.

authors

Toulouse JL,Edens TJ,Alejaldre L,Manges AR,Pelletier JN

doi

10.1128/AAC.02665-16

subject

Has Abstract

pub_date

2017-04-24 00:00:00

issue

5

eissn

0066-4804

issn

1098-6596

pii

AAC.02665-16

journal_volume

61

pub_type

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