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Seeking clarity within cloudy effluents: differentiating fungal from bacterial peritonitis in peritoneal dialysis
Ruchir Chavada1, Jen Kok, Sebastiaan van Hal
1Department of Microbiology and Infectious Diseases, Sydney South West Pathology Service, Liverpool Hospital, Liverpool, Australia.
Background:
Fungal peritonitis is a serious complication of peritoneal dialysis (PD) therapy with the majority of patients ceasing PD permanently. The aims of this study were to identify risk factors and clinical associations that may discriminate between fungal from bacterial peritonitis.
Methods:
We retrospectively identified episodes of fungal peritonitis from 2001-2010 in PD patients at Liverpool and Westmead Hospitals (Australia). Fungal peritonitis cases were matched in a 1:2 ratio with patients with bacterial peritonitis from each institution's dialysis registry, occurring closest in time to the fungal episode. Patient demographic, clinical and outcome data were obtained from the medical records.
Results:
Thirty-nine episodes of fungal peritonitis (rate of 0.02 episodes per patient-year of dialysis) were matched with 78 episodes of bacterial peritonitis. Candida species were the commonest pathogens (35/39; 90% episodes) with Candida albicans (37%), Candida parapsilosis (32%) and Candida glabrata (13%) the most frequently isolated species. Compared to bacterial peritonitis, fungal peritonitis patients had received PD for significantly longer (1133 vs. 775 catheter-days; p = 0.016), were more likely to have had previous episodes of bacterial peritonitis (51% vs. 10%; p = 0.01), and to have received prior antibacterial therapy (51% vs. 10%; p = 0.01). Patients with fungal peritonitis were less likely to have fever and abdominal pain on presentation, but had higher rates of PD catheter removal (79% vs. 22%; p<0.005), and permanent transfer to haemodialysis (87% vs. 24%; p<0.005). Hospital length of stay was significantly longer in patients with fungal peritonitis (26.1 days vs. 12.6 days; p = 0.017), but the all-cause 30-day mortality rate was similar in both groups. Fluconazole was a suitable empiric antifungal agent; with no Candida resistance detected.
Conclusion:
Prompt recognition of clinical risk factors, initiation of antifungal therapy and removal of PD catheters are key considerations in optimising outcomes.
Insights
Fungal peritonitis in peritoneal dialysis (PD) patients is linked to longer PD duration and prior infections. Early antifungal treatment and catheter removal are crucial for better outcomes.
Area of Science:
- Nephrology
- Infectious Diseases
- Peritoneal Dialysis
Background:
- Fungal peritonitis is a severe complication of peritoneal dialysis (PD), often leading to permanent cessation of the therapy.
- Identifying factors differentiating fungal from bacterial peritonitis is critical for patient management.
Purpose of the Study:
- To identify risk factors and clinical characteristics distinguishing fungal peritonitis from bacterial peritonitis in PD patients.
- To compare clinical presentations, treatment outcomes, and identify predictors of fungal peritonitis.
Main Methods:
- A retrospective study identified fungal peritonitis episodes between 2001-2010 in PD patients.
- Fungal cases were matched 1:2 with bacterial peritonitis cases based on institution and time.
- Demographic, clinical, and outcome data were collected from medical records.
Main Results:
- Candida species, particularly C. albicans, C. parapsilosis, and C. glabrata, were the most common fungal pathogens.
- Fungal peritonitis patients had longer PD duration, more prior bacterial peritonitis, and prior antibacterial therapy.
- Higher rates of PD catheter removal and transfer to hemodialysis were observed in fungal peritonitis cases, with longer hospital stays but similar 30-day mortality.
- Fluconazole demonstrated efficacy as an empiric antifungal agent with no detected Candida resistance.
Conclusions:
- Prompt recognition of clinical risk factors for fungal peritonitis is essential.
- Initiation of appropriate antifungal therapy and timely PD catheter removal are key management strategies.
- Optimizing outcomes in fungal peritonitis requires a multi-faceted approach including early diagnosis and intervention.
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