This is a randomized study to evaluate the safety and feasibility of early de-escalation of empirical antibiotics treatment in neutropenic fever patients undergoing hematopoietic stem cell transplantation (HSCT). In case of afebrile for 72 hours with empirical antibiotics treatment, patients will be randomized into 2 groups. In the early de-escalation group, antibiotics treatment will be stopped and prophylaxis with levofloxacin will be resumed. In the control group, the empirical treatment will continue until recovery of neutropenia or at least for 7 days.
Age ≥18，patients undergo hematopoietic stem cells
Patients with neutropenic fever: T≥38.5°C once or T≥38°C twice a day with ANC <0.5x109/L or predicted to be <0.5x109/L in 24 ~48 hours；
Patients achieved afebrile （T<37.5°C）for at least 72 hours；
Inform consent given
Patients with neutropenic fever with documented blood stream infection, skin and soft tissue infection, pneumonia and catheter associated infection.
Patients with septic shock
Levofloaxin allergy or contra-indication