Utilization patterns of second-line antibiotics in a health plan setting

Area of Science:

• Microbiology
• Infectious Diseases
• Pharmacology

Background:

• Antibiotic resistance is a significant global health threat.
• Inappropriate antibiotic prescribing, including for viral infections and overuse of second-line agents, contributes to resistance.
• Understanding current antibiotic utilization patterns is crucial for developing targeted interventions.

Purpose of the Study:

• To evaluate antibiotic utilization patterns of cephalosporins, macrolides, and quinolones for community-acquired infections.
• To identify prescribing practices that may contribute to antibiotic resistance.
• To inform educational strategies for providers and consumers regarding appropriate antibiotic use.

Main Methods:

• Retrospective study of community-acquired infections within a health plan's patient population.
• Utilized computerized pharmacy claims database to identify eligible patients (n=508).
• Random selection (n=650) for chart review to assess diagnosis, cultures, and antibiotic history.

Main Results:

• A significant proportion of patients (25.2%) had no documented infection diagnosis in their charts.
• Diagnostic workup, including Gram staining and cultures, was infrequently performed (14% and 19% respectively).
• Only 10.4% of patients had documented previous antibiotic failure, indicating potential overuse of broader-spectrum agents.

Conclusions:

• Suboptimal documentation and diagnostic practices were observed in antibiotic prescribing for community-acquired infections.
• Findings suggest a need for improved provider education on appropriate antibiotic selection and diagnostic stewardship.
• Interventions targeting appropriate antibiotic utilization are necessary to combat the rise of antibiotic resistance.