Abstract
The relation between gram-negative bacteremia, endotoxemia and cytokinemia in patients with hematological malignancies was studied. Serum endotoxin and cytokines (tumor necrosis factor-alpha, interleukin-1 receptor antagonist, interferon-gamma, interleukin-6 and interleukin-10) were determined in 24 patients with hematological malignancies. Patients were included at start of fever (n = 18) or during a temperature peak during continuous fever (n = 6; time = 0). Blood was drawn for cultures at time of inclusion. Additional samples were obtained and grouped in two time intervals (1-5 h and 6-12 h after inclusion). Endotoxin was detected in eight patients. Endotoxemia was more common among patients with bacteremia than among non-bacteremic patients (7/12 versus 1/12; p < 0.05). All studied cytokines showed a tendency to higher mean values at time 0 in patients with endotoxemia than in patients without endotoxemia. Significantly higher mean endotoxin values were seen at time 1-5 h in patients with gram-negative bacteremia (n = 6) than in patients without gram-negative bacteremia, and at time 0 in patients with chills (n = 6) compared to those without chills.
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