Decreasing incidence rates of bacteremia: a 9-year population-based study

Area of Science:

• Infectious Diseases
• Epidemiology
• Public Health

Background:

• Bacteremia incidence has been rising, but distinctions between acquisition types are often unclear.
• Understanding trends in community-acquired, healthcare-associated, and nosocomial bacteremia is crucial for public health.
• This study addresses the need for detailed analysis of bacteremia incidence by acquisition source.

Purpose of the Study:

• To analyze trends in bacteremia incidence rates stratified by place of acquisition.
• To identify changes in the causative microorganisms of bacteremia over time.
• To provide population-based data on bacteremia epidemiology in Denmark.

Main Methods:

• Population-based cohort study in Funen County, Denmark (2000-2008).
• Inclusion of adults with first-time bacteremia (N = 7786).
• Poisson regression used to estimate incidence rate trends.

Main Results:

• Overall bacteremia incidence decreased by 23.3% annually.
• Community-acquired bacteremia incidence fell by 25.6%, and nosocomial by 28.9%.
• Healthcare-associated bacteremia incidence remained stable; Enterococcus proportion increased, while coagulase-negative staphylococci decreased.

Conclusions:

• Substantial decreases observed in community-acquired and nosocomial bacteremia incidence rates.
• Bacteremia trends vary by acquisition source, highlighting the need for specific interventions.
• Microorganism distribution shifts warrant continued surveillance.