Contact-mediated bacterial transmission and infection risk dynamics in a newly opened hospital ward

Area of Science:

• Microbiology
• Hospital Epidemiology
• Environmental Health

Background:

• The hospital microbiome impacts patient recovery and clinical outcomes.
• Microbial colonization and transmission dynamics in new hospital environments are not well understood.
• Understanding these dynamics is crucial for infection control.

Purpose of the Study:

• To investigate bacterial community dynamics on surfaces in a new neurosurgery ward.
• To assess changes in the hospital microbiome after the facility became operational.
• To identify the influence of patient contact on surface microbial communities.

Main Methods:

• 16S rRNA gene amplicon sequencing (V3-V4 region, Illumina platform) was used.
• Bacterial communities on various surfaces (bedrails, floors, handles, faucets) were analyzed.
• Comparisons were made between pre- and post-opening states, and between different surface types.

Main Results:

• Bacterial diversity showed site-specific patterns, increasing on floors and drawer handles but decreasing on bedrails and faucet handles post-opening.
• Surfaces with high patient contact (bedrails, drawer handles, faucet handles) displayed the greatest compositional changes.
• Bacterial communities became more homogeneous across sites after opening, suggesting transmission.
• Patient hand microbiomes significantly influenced ward bacterial communities, especially on bedrails.
• The pathogenic potential of bedrail microbiomes increased post-opening, though not directly linked to clinical infection risk.

Conclusions:

• Human contact is a primary driver of hospital microbiome composition.
• Distinct site-specific patterns and increased homogeneity indicate bacterial transmission.
• Targeted infection control strategies are essential to mitigate pathogen transfer in hospitals.