Beacon-based (bbFISH®) technology for rapid pathogens identification in blood cultures

Area of Science:

• Clinical Microbiology
• Infectious Diseases
• Diagnostic Technology

Background:

• Bloodstream infections (BSI) diagnosis is often delayed by traditional blood culture methods.
• Timely pathogen identification in BSI is critical for improving sepsis patient survival rates.
• Beacon-based fluorescent in situ hybridization (hemoFISH®) offers accelerated identification of common sepsis pathogens.

Purpose of the Study:

• To evaluate the performance of the hemoFISH® assay for rapid identification of bacterial pathogens in blood cultures.
• To compare the diagnostic accuracy and time-to-result of hemoFISH® against traditional culture-based methods.

Main Methods:

• A total of 558 blood cultures (377 positive, 181 negative) were analyzed using the hemoFISH® method.
• Results from hemoFISH® were compared with those obtained from conventional culture-based diagnostic techniques.
• hemoFISH® test kits (Gram-positive and Gram-negative) from miacom diagnostics were utilized.

Main Results:

• The hemoFISH® assay demonstrated high diagnostic accuracy with an overall sensitivity of 94.16% and specificity of 100%.
• Positive predictive value (PPV) was 100%, and negative predictive value (NPV) was 89.16%.
• hemoFISH® provided results within 45 minutes, significantly reducing the time to diagnosis by approximately two days compared to traditional methods.

Conclusions:

• The hemoFISH® assay is a reliable tool for rapid pathogen identification in clinical microbiology laboratories.
• Its high sensitivity and specificity, coupled with significant time savings, support its integration alongside traditional diagnostic systems.
• The p-value of 0.0001 indicates a statistically significant time advantage for the hemoFISH® assay.