ABSTRACT
<p><b>OBJECTIVE</b>To compare the diagnostic values of CD64 infection index, C-reactive protein (CRP), procalcitonin (PCT) and the percentage of neutrophils (NEU%) in leukemia patients complicated with bacterial infection.</p><p><b>METHODS</b>Sixty cases of leukemia complicated with bacterial infection (combination with infection group), 60 cases of leukemia without bacterial infection (non-combination with infection group) and 60 cases of healthy persons (control group) were selected in our hospital. CD64 infection index, CRP, PCT and NEU% were detected in the 3 group.</p><p><b>RESULTS</b>CD64 infection index, CRP, PCT and NEU% in combination with infection group were significantly higher than those in the non-combination with infection group and also significantly higher than those in the control group (all P<0.05). The CD64 infection index, CRP, PCT and NEU% in the non-combination with infection group were significantly higher than those in the control group (all P<0.05). The sensitivities of CD64, CRP, PCT and NEU% in the diagnosis of the leukemia with bacterial infection were 71.06%, 84.86%, 66.93% and 59.25% respectively, and the specificities of CD64, CRP, PCT and NEU% were 91.46%, 75.94%, 88.79% and 85.36% respectively.</p><p><b>CONCLUSION</b>Compared with CRP, PCT and NEU%, CD64 infection index for diagnosis of leukemia complicated with bacterial infection has higher specificity, which is helpful for the early diagnosis of the disease.</p>