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Updated: Mar 11, 2026
Endotoxin Activity Assay for the Detection of Whole Blood Endotoxemia in Critically Ill Patients
Published on: June 24, 2019
Dialysate bacterial endotoxin as a prognostic indicator of peritoneal dialysis related peritonitis
Cheuk-Chun Szeto1, Ka-Bik Lai1, Kai-Ming Chow1
1From Carol and Richard Yu Peritoneal Dialysis Research Centre, Department of Medicine & Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong, China.
Abstract:
Peritonitis is the major complication of peritoneal dialysis (PD). The aim of our present study is to explore the prognostic value of endotoxin level in PD effluent for the prediction of treatment failure in PD-related peritonitis. We studied 325 peritonitis episodes in 223 patients. PD effluent (PDE) was collected every 5 days for endotoxin level and leukocyte count. Patients were followed for relapsing or recurrent peritonitis. We found 20 episodes (6.2%) had primary treatment failure; 41 (12.6%) developed relapsing, 19 (5.8%) had recurrent, and 22 (6.8%) had repeat episodes. Endotoxin was detectable in the PDE of 19 episodes (24.4%) caused by Gram negative organisms, 4 episodes (6.8%) of mixed bacterial growth, and none of the culture negative episodes or those by Gram positive organisms. For episodes caused by Gram negative bacteria, a detectable endotoxin level in PDE on day 5 had a sensitivity and specificity of 66.7% and 83.3%, respectively, for predicting primary treatment failure. In contrast, PDE leukocyte count > 1000 per mm3 on day 5 had a sensitivity and specificity of 88.9% and 89.1%, respectively; the addition of PDE endotoxin assay did not improve the sensitivity or specificity. We conclude that detectable endotoxin in PDE 5 days after antibiotic therapy might predict primary treatment failure in peritonitis episodes caused by Gram negative organisms. However, the sensitivity and specificity of PDE endotoxin assay was inferior to PDE leukocyte count.
Insights
Peritonitis is a major complication of peritoneal dialysis (PD). While endotoxin in PD effluent may predict treatment failure in Gram-negative peritonitis, it is less sensitive and specific than leukocyte counts.
Area of Science:
- Nephrology
- Infectious Diseases
- Clinical Diagnostics
Background:
- Peritonitis remains a significant complication of peritoneal dialysis (PD).
- Early prediction of treatment failure is crucial for managing PD-related peritonitis.
- Endotoxin levels in peritoneal dialysis effluent (PDE) are investigated as a potential prognostic marker.
Purpose of the Study:
- To evaluate the prognostic value of endotoxin levels in PDE for predicting treatment failure in PD-related peritonitis.
- To compare the efficacy of endotoxin detection versus leukocyte count in PDE for treatment failure prediction.
Main Methods:
- A study of 325 peritonitis episodes in 223 patients undergoing PD.
- Collection of PDE every 5 days for endotoxin level and leukocyte count analysis.
- Follow-up of patients for treatment outcomes including primary failure, relapse, recurrence, and repeat episodes.
Main Results:
- Primary treatment failure occurred in 6.2% of episodes.
- Endotoxin was detectable in 24.4% of Gram-negative peritonitis episodes.
- On day 5, detectable PDE endotoxin predicted Gram-negative peritonitis treatment failure with 66.7% sensitivity and 83.3% specificity.
- PDE leukocyte count (>1000/mm³) on day 5 showed higher sensitivity (88.9%) and specificity (89.1%) and was not improved by adding endotoxin assay.
Conclusions:
- Detectable endotoxin in PDE 5 days after antibiotic initiation may predict primary treatment failure in Gram-negative peritonitis.
- PDE leukocyte count is a more sensitive and specific predictor of treatment failure than PDE endotoxin levels.
- Endotoxin assays did not improve the predictive value when combined with leukocyte counts.
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