A case-control study to detect modifiable risk factors for colonization with vancomycin-resistant enterococci

Area of Science:

• Infectious Diseases
• Hospital Epidemiology
• Clinical Microbiology

Background:

• Vancomycin-resistant Enterococcus (VRE) poses a significant threat in healthcare settings.
• Hospital outbreaks necessitate rapid identification of modifiable risk factors for effective control.
• Understanding colonization dynamics is crucial for preventing VRE transmission.

Purpose of the Study:

• To identify modifiable risk factors for vancomycin-resistant Enterococcus (VRE) colonization.
• To investigate the association between specific antibiotic use and VRE colonization during a hospital outbreak.
• To determine if nursing workload intensity is a risk factor for VRE colonization.

Main Methods:

• A case-control study design was employed.
• Data were collected during a VRE hospital outbreak.
• Statistical analysis, including odds ratios and confidence intervals, was used to assess risk factors.

Main Results:

• Cephalosporin antibiotic use was identified as the sole independent risk factor for VRE colonization (OR, 13.8; 95% CI, 2.5-76.3; P = .01).
• Nursing workload intensity did not show a statistically significant association with VRE colonization in this study.
• The findings highlight a specific antibiotic class linked to increased VRE risk.

Conclusions:

• Cephalosporin administration is a critical, modifiable risk factor for VRE colonization during hospital outbreaks.
• Targeted antimicrobial stewardship interventions focusing on cephalosporin use may help mitigate VRE spread.
• Nursing workload is not a significant driver of VRE colonization, suggesting other factors are more influential.