Escherichia coli
Research Article | Applied and Environmental ScienceDiverse Commensal Escherichia coli Clones and Plasmids Disseminate Antimicrobial Resistance Genes in Domestic Animals and Children in a Semirural Community in Ecuador...Even though Escherichia coli strains may share nearly identical phenotypic AMR profiles and AMR genes and overlap in space and time, the diversity of clones and plasmids challenges research that aims to identify sources of AMR. Horizontal gene transfer appears to play a more significant role than clonal expansion in the spread of AMR in this community.
Observation | Applied and Environmental ScienceSalmonella Genomic Island 1B Variant Found in a Sequence Type 117 Avian Pathogenic Escherichia coli IsolateSGI1 and variants of it carry a variety of antimicrobial resistance genes, including those conferring resistance to extended-spectrum β-lactams and carbapenems, and have been found in diverse S. enterica serovars, Acinetobacter baumannii, and other members of the...
Observation | Applied and Environmental ScienceA Novel Trimethoprim Resistance Gene, dfrA36, Characterized from Escherichia coli from CalvesThe presence of dfrA36 associated with ISCR2 in Escherichia coli from animals, as well as its presence in other E. coli strains from different sources and countries and in Acinetobacter, highlights the global...
Research Article | Molecular Biology and PhysiologyOXA-48-Mediated Ceftazidime-Avibactam Resistance Is Associated with Evolutionary Trade-OffsThe recent introduction of novel β-lactam/β-lactamase inhibitor combinations like ceftazidime-avibactam has increased our ability to treat infections caused by multidrug-resistant Gram-negative bacteria, including carbapenemase-producing Enterobacterales. However, the increasing number of cases of reported resistance to ceftazidime-avibactam is a concern. OXA-48 is a carbapenemase that has no significant effect on ceftazidime,...
Research Article | Host-Microbe Biologyd-Serine Degradation by Proteus mirabilis Contributes to Fitness during Single-Species and Polymicrobial Catheter-Associated Urinary Tract InfectionUrinary tract infections are among the most common health care-associated infections worldwide, the majority of which involve a urinary catheter (CAUTI). Our recent investigation of CAUTIs in nursing home residents identified Proteus mirabilis, Enterococcus species, and Escherichia coli as...
Research Article | Host-Microbe BiologyTemporal Variability of Escherichia coli Diversity in the Gastrointestinal Tracts of Tanzanian Children with and without Exposure to AntibioticsThis study increases the number of resident Escherichia coli genome sequences, and explores E. coli diversity through longitudinal sampling. We investigate the genomes of E. coli isolated from human gastrointestinal tracts as part...
Research Article | Clinical Science and EpidemiologyDiscovery of mcr-1-Mediated Colistin Resistance in a Highly Virulent Escherichia coli LineageEscherichia coli ST95 is a globally disseminated clone frequently associated with bloodstream infections and neonatal meningitis. However, the ST95 lineage is defined by low levels of drug resistance amongst clinical isolates, which normally provides for uncomplicated treatment options. Here, we provide the first detailed genomic analysis of an...
Research Article | Molecular Biology and PhysiologyMinicells as a Damage Disposal Mechanism in Escherichia coliBacteria have the ability to produce minicells, or small spherical versions of themselves that lack chromosomal DNA and are unable to replicate. A minicell can constitute as much as 20% of the cell’s volume. Although molecular biology and biotechnology have used minicells as laboratory tools for several decades, it is still puzzling that bacteria should produce such costly but potentially nonfunctional structures. Here, we show that...
Research Article | Applied and Environmental ScienceA Population-Based Surveillance Study of Shared Genotypes of Escherichia coli Isolates from Retail Meat and Suspected Cases of Urinary Tract InfectionsCommunity-acquired urinary tract infection caused by Escherichia coli is one of the most common infectious diseases in the United States, affecting approximately seven million women and costing approximately 11.6 billion dollars annually. In addition, antibiotic resistance among E. coli bacteria...
Research Article | Clinical Science and EpidemiologyEscherichia coli Sequence Type 410 Is Causing New International High-Risk ClonesExtraintestinal pathogenic Escherichia coli (ExPEC) is the main cause of urinary tract infections and septicemia. Significant attention has been given to the ExPEC sequence type ST131, which has been categorized as a “high-risk” clone. High-risk clones are globally distributed clones associated with various antimicrobial resistance determinants, ease of transmission,...