Healthcare associated infective endocarditis: a distinct entity

Area of Science:

• Infectious Diseases
• Cardiology
• Public Health

Background:

• Traditional terms like hospital-acquired and community-acquired infections inadequately describe all infection origins.
• The term healthcare-associated infection (HCA) has been introduced to encompass a broader spectrum of infection acquisition.
• Infective endocarditis (IE) presents a complex case for infection categorization.

Purpose of the Study:

• To evaluate the applicability of the 'healthcare-associated infection' (HCA) classification to patients with infective endocarditis (IE).
• To differentiate IE cases based on acquisition source: hospital-acquired (HA), healthcare-associated (HCA), and community-acquired (CA).
• To analyze the etiological agents and mortality rates across different IE acquisition categories.

Main Methods:

• Categorization of 125 culture-positive IE episodes into HA, HCA, and CA groups based on acquisition criteria.
• Analysis of causative pathogens in HCA IE versus CA IE groups.
• Comparison of mortality rates between HCA/HA IE groups and CA IE group.

Main Results:

• 42% of IE episodes were classified as HCA IE, occurring in patients with significant prior healthcare contact.
• Nosocomial pathogens were significantly more prevalent in HCA IE (77%) compared to CA IE (22%).
• Combined HA and HCA IE groups exhibited significantly higher mortality (31%) than the CA IE group (10%).

Conclusions:

• Healthcare-associated infective endocarditis (HCA IE) represents a substantial and distinct category of IE.
• HCA IE is etiologically and clinically different from community-acquired IE (CA IE).
• The distinct nature of HCA IE suggests a need for potentially different therapeutic approaches.