Miedema et al. [4] reported 52 febrile neutropenic episodes in 32 children; IL-8 was significantly higher in patients with bacteremia and they also determined that the median level of IL-8 was significantly higher in bacteremia caused by gram-negative bacteria than gram-positive bacteria (678 vs.140 ng/L). The gene discussed is CXCL8; the disease is bacterial infectious disease with sepsis.