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Infection Risk Associated With Colonization by Multidrug-Resistant Gram-Negative Bacteria: An Umbrella Review and

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This summary is machine-generated.

Multidrug-resistant gram-negative bacteria (MDR-GNB) colonization leads to a 22% infection rate for extended-spectrum beta-lactamases (ESBL-E) and carbapenem-resistant Enterobacterales (CRE). This highlights a significant global health threat requiring further research into decolonization strategies.

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Area of Science:

  • Infectious Diseases
  • Microbiology
  • Public Health

Background:

  • Multidrug-resistant gram-negative bacteria (MDR-GNB), including extended-spectrum beta-lactamase-producing Enterobacterales (ESBL-E) and carbapenem-resistant Enterobacterales (CRE), pose a significant global health risk.
  • Colonization with these pathogens is a precursor to infection, necessitating an understanding of infection rates.

Purpose of the Study:

  • To assess the quality of existing evidence on infection rates following MDR-GNB colonization.
  • To provide pooled estimates for the incidence of infection after colonization with specific MDR-GNB, namely ESBL-E and CRE.

Main Methods:

  • An umbrella review methodology was employed, analyzing systematic reviews and meta-analyses.
  • The AMSTAR 2 tool was utilized to evaluate the quality of the included reviews.
  • A meta-analysis was conducted to synthesize and estimate the rate of infection.

Main Results:

  • Out of 847 initial results, 17 systematic reviews and meta-analyses were included after quality and overlap exclusions.
  • The pooled incidence of infection following colonization was 22% for both ESBL-E and CRE.
  • Limited high-quality data were available regarding mortality, transmission, or infections caused by MDR *Pseudomonas aeruginosa* and carbapenem-resistant *Acinetobacter baumannii*.

Conclusions:

  • Colonization with MDR-GNB is associated with a substantial rate of subsequent infection.
  • Findings can inform patient counseling, decolonization research, clinical trial design, and regulatory processes for new agents.
  • Population heterogeneity in the reviewed studies may affect the generalizability of the findings.