Observational Study of Microbial Colonization and Infection in Neurological Intensive Care Patients Based on...

Area of Science:

• Neurology
• Infectious Diseases
• Critical Care Medicine

Background:

• Patients with central nervous system injuries in intensive care units (ICUs) are susceptible to nosocomial infections.
• Limited data exists on microbial colonization and infection patterns in this vulnerable patient group.

Purpose of the Study:

• To investigate the incidence and patterns of microbial colonization and infection in patients with brain injuries admitted to the ICU.
• To identify pathogens associated with pneumonia and sepsis in this population.
• To analyze the impact of microbial culture type (monomicrobial vs. polymicrobial) on infection development.

Main Methods:

• Electronic health record-based study of 1614 patients with brain injury admitted to the ICU between 2017 and 2023.
• Analysis of infectious complications, pathogen identification, and antimicrobial resistance patterns.
• Statistical analysis to determine associations between pathogens, culture types, and infection outcomes.

Main Results:

• Pneumonia was the most frequent infectious complication (54.46%), often preceding sepsis.
• Pseudomonas aeruginosa was significantly associated with the development of pneumonia and sepsis.
• Monomicrobial colonization was linked to a higher likelihood of developing pneumonia compared to polymicrobial colonization.
• High levels of multidrug resistance were observed in both Gram-negative (88-100%) and Gram-positive (48-97%) bacteria.

Conclusions:

• Neurological ICUs exhibit a substantial burden of multidrug-resistant organisms (MDROs).
• Novel ecosystem-based insights into mono- and polymicrobial colonization and infection development were provided.
• Findings can inform the development of targeted strategies to prevent infections in critically ill neurological patients.