Abstract
Eosinophilic peritonitis (EP) is sometimes difficult to distinguish from bacterial peritonitis (BP) at onset, as they are often overlapping. Previous reports show EP occurs more frequently in infants, although the reason is unknown. The study population was 77 pediatric patients receiving chronic peritoneal dialysis (PD) in our center. We compared clinical and laboratory data at onset of EP with those of BP. We also investigated age distribution at onset of EP and PD-related surgery. Eleven patients developed EP (18 episodes) and 19 patients developed BP (38 episodes). EP patients showed lower rate of cloudy dialysate (44.4% vs. 74.4%; p = 0.04), lower rate of fever (38.9% vs. 56.4%), lower frequency of abdominal pain (16.7% vs. 38.5%), higher peripheral blood eosinophil counts (/μL) (514 vs. 160; p < 0.001), and lower serum C-reactive protein level (mg/dL) (0.4 vs. 4.7; p < 0.001) than BP patients. Thirteen EP events were observed after 169 surgical interventions. Age at surgery-related EP was similar to age at surgery without EP (2.6 vs. 2.1; p = 0.65). There was no significant difference in postoperative EP occurrence between groups <2 years and ≥ 2 years (6.2% vs. 9.1%; p = 0.48). However, infants received more operations than older children. Clinical symptoms in children and laboratory data of EP in children were less severe than those of BP. As incidence of postoperative EP did not differ by age, we speculate that higher incidence of EP in infants might be associated with higher incidence of surgery, although further validation is necessary.
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