Plasma endotoxin levels in patients with BA. Detection of plasma endotoxin levels by chromogenic Limulus amebocyte lysate (LAL) test in 7 healthy controls, 24 patients with early-stage BA, 18 patients followed-up at the OPD post-Kasai, 18 patients with late-stage BA, and 9 patients with CC. Data represent the mean ± SD of duplicate experiments. Statistical differences were tested by nonparametric Wilcoxon matched-pairs test. *p < 0.05, **p < 0.01.