Skin bacterial richness and diversity in intensive care unit patients with severe pneumonia

Area of Science:

• Microbiology
• Intensive Care Medicine
• Infectious Diseases

Background:

• Patients with severe pneumonia in intensive care units (ICUs) face high mortality risks.
• The role of the skin microbiome in ICU patient outcomes, particularly those with severe pneumonia, is not well understood.
• Understanding skin bacterial composition is crucial for managing severe pneumonia in ICUs.

Purpose of the Study:

• To investigate differences in skin bacterial richness and diversity between severe pneumonia patients in the ICU and healthy controls.
• To identify specific bacterial taxa that are differentially abundant on the skin of ICU patients with severe pneumonia.

Main Methods:

• 16S ribosomal RNA sequencing was used to analyze skin bacterial communities.
• The Quantitative Insights Into Microbial Ecology (QIIME) pipeline was employed for data analysis.
• Skin bacterial diversity and taxonomic distribution were compared between the patient group (PG) and control group (CG).

Main Results:

• Skin bacterial diversity was significantly lower in the ICU patient group compared to the healthy control group.
• Specific bacteria, including Staphylococcus, Acinetobacter, Stenotrophomonas, Enterococcus, Halomonas, and Brevibacillus, were found in different abundances in the patient group.
• Many of these differentially abundant bacteria were also detected in respiratory tract samples from the same patients.

Conclusions:

• Healthcare-associated infections in ICU patients with severe pneumonia are strongly associated with alterations in the skin microbiota.
• Preventing and controlling skin bacterial pathogens is essential for improving outcomes in these vulnerable patients.