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Extraintestinal Invasive Escherichia coli Infections in the US.

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Invasive Escherichia coli infections pose a significant public health threat, particularly in older adults, with concerning antimicrobial resistance rates. This study highlights the urgent need for enhanced prevention strategies against invasive E. coli (EIEC).

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Area of Science:

  • Infectious Diseases
  • Epidemiology
  • Microbiology

Background:

  • Extraintestinal invasive Escherichia coli (EIEC) infections are a major cause of sepsis and hospitalizations.
  • Antimicrobial resistance in EIEC is a growing concern, complicating treatment and patient outcomes.

Purpose of the Study:

  • To determine the epidemiology of invasive E. coli infections in the US.
  • To characterize the clinical and molecular features of these infections.

Main Methods:

  • A cohort study utilizing active laboratory- and population-based surveillance data from 9 US sites.
  • Data included over 7.2 million individuals, analyzing medical records and isolate characteristics from June to August 2023.

Main Results:

  • The study identified 1345 cases of EIEC, with an overall annual incidence rate of 74.7 per 100,000 population.
  • Infections were more common in individuals aged 60 years and older, with diabetes being a frequent underlying condition.
  • High rates of antimicrobial resistance were observed, including resistance to ciprofloxacin (25.9%) and trimethoprim-sulfamethoxazole (28.8%).

Conclusions:

  • Invasive E. coli disease represents a substantial public health burden, disproportionately affecting older populations.
  • High antimicrobial resistance rates underscore the need for effective public health prevention efforts and antimicrobial stewardship.