A multi-center prospective cohort study will be conducted to explore the change trend of eosinophil in peritoneal dialysis effluent during peritoneal dialysis-associated peritonitis, and to explore the relationship between eosinophil increase, peritonitis severity and antibiotic use. This study will provide evidence for routine eosinophil testing

A multi-center prospective cohort study will be conducted to explore the change trend of eosinophil in peritoneal dialysis effluent during peritoneal dialysis-associated peritonitis, and to explore the relationship between eosinophil increase, peritonitis severity and antibiotic use. In this study, 100 patients with peritoneal dialysis-associated peritonitis who meet the inclusion criteria will be selected. Demographic data, laboratory variables, peritoneal fluid cytology and bacterial culture will be collected within 24 hours of peritonitis (day 1). Peritoneal fluid cytology includes leukocyte classification and eosinophilic leukocyte count will be examined at day 3, 5, 7, 10, 14, 21, 30, 60 and 90 after peritonitis. All patients will be followed up for 90 days, and their peritonitis outcome will be recorded. The primary endpoint is the prevalence of eosinophil increase in peritoneal effluent, which is defined as >100 eosinophils/mm^3, or >10% eosinophils of the total non-erythrocyte count. Secondary end points are peritonitis outcome at month 1 and 3 including transfer to hemodialysis , death.

Inclusion Criteria:

• Diagnosed as peritoneal dialysis-related peritonitis;
• Age> 14 years
• Maintenance peritoneal dialysis due to end-stage renal failure ≥3 months
• Use of lactate glucose dialysate

Exclusion Criteria:

• Those who cannot be followed up regularly
• Reluctant to join this researcher

patients on peritoneal dialysis