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Evaluation of T2Candida Panel for detection of Candida in peritoneal dialysates
Anne M Kouri1, Theodore W Kieffer2, Corina Nailescu1
1Department of Pediatric Nephrology and Hypertension, Indiana University School of Medicine, Indianapolis, USA.
Abstract:
Fungal peritonitis in the peritoneal dialysis population is difficult to diagnose promptly due to the inherently slow cultivation-based methods currently required for identification of peritonitis pathogens. Because of the moderate risk for severe complications, the need for rapid diagnostics is considerable. One possible solution to this unmet need is the T2Candida Panel, a new technology designed to detect the most common pathogenic Candida spp. directly from whole blood specimens in as little as a few hours. We hypothesized that this technology could be applied to the detection of Candida in peritoneal dialysate, a matrix not currently approved by the Food and Drug Administration for testing by this system. Remnant dialysate samples from three healthy (noninfected) pediatric peritoneal dialysis patients were spiked with Candida glabrata, serially diluted, and tested in triplicate with unaltered dialysate specimens. The assay detected C. glabrata in 100% of spiked dialysate samples across the full spectrum of dilutions tested, and no assay inhibition or cross-reactivity was noted. These findings suggest one of possibly more applications of this technology. The positive clinical implications of this test will continue to be realized as its use is validated in peritoneal dialysate and other patient specimen types.
Insights
Rapidly diagnosing fungal peritonitis in peritoneal dialysis patients is crucial. The T2Candida Panel shows promise for detecting Candida species directly in dialysate, offering a faster alternative to traditional methods.
Area of Science:
- Medical Diagnostics
- Clinical Microbiology
- Peritoneal Dialysis
Background:
- Fungal peritonitis diagnosis in peritoneal dialysis (PD) patients is challenging due to slow, culture-based pathogen identification.
- Prompt diagnosis is critical due to the risk of severe complications.
Purpose of the Study:
- To evaluate the T2Candida Panel's ability to detect Candida species in peritoneal dialysate.
- To assess the feasibility of using this technology for rapid diagnosis of fungal peritonitis in PD patients.
Main Methods:
- Remnant dialysate samples from pediatric PD patients were spiked with Candida glabrata.
- Samples were serially diluted and tested in triplicate using the T2Candida Panel.
- Assay performance was evaluated for detection, inhibition, and cross-reactivity.
Main Results:
- The T2Candida Panel successfully detected Candida glabrata in 100% of spiked dialysate samples across all dilutions.
- No assay inhibition or cross-reactivity was observed in the tested specimens.
- The technology demonstrated high sensitivity and specificity in this matrix.
Conclusions:
- The T2Candida Panel shows potential for direct detection of Candida in peritoneal dialysate.
- This technology could significantly expedite the diagnosis of fungal peritonitis in PD patients.
- Further validation in clinical settings is warranted to realize the full clinical implications.
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