<p>IL-8 production was measured by using a kit ELISA. IL-8 plasma levels were similar in XLA and HD. (A) After <i>E</i>. <i>Coli</i> stimulation, IL-8 increased in XLA and HD. (B) After IVIg infusion, IL-8 levels remained unchanged and the level after <i>E</i>. <i>coli</i> stimulation was well preserved. Data show that only one XLA patient (gold) with a severe inflammatory condition had a very high IL-8 plasma levels. The same patient exhibited high level of IL-8 after <i>E</i>. <i>Coli</i> stimulation. Concentrations were expressed as pg/ml. <i>*</i>p = 0.042; **p = 0.043.</p
