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[Basic and clinical evaluation of lysis centrifugation in candidemia]
1Second Department of Internal Medicine, Nagasaki University School of Medicine.
Summary
Lysis centrifugation with Isolator 10 offers faster detection of Candida species in blood cultures compared to traditional methods. This blood culture technique significantly reduces time to positivity for common fungal pathogens.
Area of Science:
- Clinical Microbiology
- Infectious Diseases
- Diagnostic Mycology
Context:
- Bloodstream infections caused by Candida species are a significant cause of morbidity and mortality.
- Accurate and timely diagnosis is crucial for effective patient management.
- Traditional culture bottle methods for blood cultures can have prolonged detection times for certain pathogens.
Purpose:
- To evaluate and compare the diagnostic performance of lysis centrifugation using the Isolator 10 system against conventional culture bottle methods for detecting Candida species in blood samples.
- To assess the time to positivity for Candida albicans, Candida tropicalis, and Candida parapsilosis using both blood culture techniques.
Summary:
- Lysis centrifugation using Isolator 10 demonstrated a shorter culture duration for Candida albicans and Candida parapsilosis compared to culture bottles.
- Candida species were detected within 1-2 days by lysis centrifugation, whereas culture bottles required 4-8 days.
- Clinical evaluation showed lysis centrifugation detected 6 additional positive samples missed by culture bottles, highlighting its enhanced sensitivity.
Impact:
- The lysis centrifugation method offers a significant improvement in the speed of Candida detection in blood cultures.
- Faster diagnosis can lead to earlier initiation of antifungal therapy, potentially improving patient outcomes.
- This method enhances the detection rate of candidemia, especially when compared to conventional culture bottle systems.