Enhanced microbiological evaluation of brain abscesses by proteomics-based techniques: a prospective cohort study

Area of Science:

• Neuroscience
• Infectious Diseases
• Proteomics

Background:

• Conventional microbiological analysis often fails to identify pathogens in brain abscesses, complicating treatment.
• Accurate pathogen identification is crucial for tailoring antimicrobial therapy and understanding infection sources.

Purpose of the Study:

• To evaluate the utility of proteomics analysis in identifying causative pathogens in brain abscesses.
• To compare proteomics findings with conventional microbiological analysis.
• To explore correlations between host proteins and abscess volume.

Main Methods:

• A prospective, single-center study involving 34 brain abscess patients over one year.
• Proteome-based analysis was performed on abscess samples.
• Results were compared with conventional microbiological analysis, and host proteins were correlated with abscess volume.

Main Results:

• Proteomics successfully identified pathogens in 55.9% of samples, revealing polymicrobial infections in most cases (median 4 microorganisms/sample).
• Conventional methods identified pathogens in 73.5% of patients, with only 66.7% concordance with proteomics.
• Specific inflammatory proteins correlated positively or negatively with abscess volume.

Conclusions:

• Proteomics analysis indicates brain abscesses are frequently polymicrobial, supporting the use of broad-spectrum antibiotics.
• This technique enhances diagnostic capabilities, especially when conventional methods are inconclusive.
• Proteomics provides valuable insights into microorganism-host interactions within brain abscesses.