"Cloud" health-care workers

Area of Science:

• Infectious Diseases
• Hospital Epidemiology
• Microbiology

Background:

• Health-care workers (HCWs) can be asymptomatic carriers of pathogenic bacteria.
• Bacterial dispersal by HCWs is a known cause of hospital-acquired infections.
• Specific bacteria, including group A streptococci and Staphylococcus aureus, are implicated.

Purpose of the Study:

• To review and summarize evidence supporting the existence of "cloud" health-care workers.
• To understand the airborne dispersal of bacteria by colonized HCWs.
• To highlight the role of asymptomatic carriage in hospital infection outbreaks.

Main Methods:

• Literature review of studies on bacterial dispersal by HCWs.
• Analysis of outbreaks linked to asymptomatic colonization.
• Examination of the "cloud" phenomenon associated with Staphylococcus aureus.

Main Results:

• Asymptomatic colonization (rectal, vaginal, skin) of HCWs with group A streptococci can lead to surgical site infections via airborne dispersal.
• The "cloud" phenomenon describes airborne dispersal of Staphylococcus aureus associated with HCW skin colonization or viral infections.
• Evidence supports the transmission of bacteria from colonized HCWs to patients.

Conclusions:

• Asymptomatic HCWs pose a significant risk for transmitting bacteria, contributing to hospital infections.
• Airborne dispersal mechanisms, like the "cloud" phenomenon, are critical pathways for pathogen transmission in healthcare settings.
• Recognizing and managing "cloud" HCWs is essential for infection control.