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Published on: February 24, 2026
[Hospital infections: sources and routes of infection]
1Odense Universitetshospital, Klinisk Mikrobiologisk Afdeling, Odense C. hans.joern.kolmos@ouh.regionsyddanmark.dk
Abstract:
Hospital infections arise by autoinfection from patients' endogenous flora, by cross infection from other patients and hospital staff, and by transmission of pathogens from items in the hospital environment. Organisms may be transmitted by direct and indirect contact, by the airborne route, and with water, food and drugs. This review details the more important routes of infection, highlighting among others the role of Staphylococcus aureus carriage in patients and staff, issues related to disinfection of endoscopes, and the risk of transmitting blood-borne viruses with multidose vials.
Insights
Hospital infections spread through patient flora, staff, and the environment via contact, air, water, food, and drugs. Key concerns include Staphylococcus aureus carriage, endoscope disinfection, and blood-borne virus transmission from multidose vials.
Area of Science:
- Infectious Diseases
- Hospital Epidemiology
- Microbiology
Context:
- Hospital-acquired infections (HAIs) pose a significant threat to patient safety.
- Understanding transmission routes is crucial for effective infection control.
- The hospital environment harbors diverse pathogens.
Purpose:
- To review the primary routes of hospital infection transmission.
- To highlight critical areas of concern in preventing healthcare-associated infections.
- To inform infection control strategies.
Summary:
- Infections originate from endogenous flora, cross-contamination (patients/staff), and the environment.
- Transmission occurs via direct/indirect contact, airborne routes, contaminated water, food, and drugs.
- Specific risks include Staphylococcus aureus carriage, inadequate endoscope disinfection, and blood-borne virus spread from multidose vials.
Impact:
- Provides a comprehensive overview of hospital infection pathways.
- Identifies key vulnerabilities in current healthcare practices.
- Supports the development of targeted infection prevention and control measures.
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