The combination of amoxicillin-clavulanate (AC) and a fluoroquinolone (FQ) is currently recommended for the treatment for outpatients with hematologic malignancies presenting with chemotherapy-induced fever (CIF), if the expected duration of neutropenia is \< 7 days. However, infections due to Pseudomonas aeruginosa (naturally resistant to AC) are rare in this population. Furthermore, FQ might result in severe adverse events, and to the selection of bacterial resistance.
The investigators hypothesize that monotherapy with AC is non-inferior to the reference treatment AC + FQ in the outpatient treatment of CIF in adult hematology patients.
Method: Pragmatic, multicentre, randomized clinical trial, controlled in two parallel groups, with stratified randomization according to the type of haematological disorder. The study will include 1,526 adult patients with one of the following haematological disorders: (1) lymphoma of all histology types treated with the goal of remission; (2) myelodysplasia treated with azacytidine; (3) acute myeloblastic leukemia receiving non-intensive care, with a basal neutrophils count \> 1000/mm3. The participants will be randomized prior to chemotherapy to receive either Amoxicillin-clavulanate 1g/152 mg tid. (AC) or Amoxicillin-clavulanate 1g/152 mg tid. and Ciprofloxacin 500 mg bid. (AC+C) orally for 7 days, to be taken in case of CIF. Only the first episode of CIF of each patient will be included in the analysis. The main evaluation criterion will be clinical success, defined as apyrexia 4 days after the first antibiotic dose, without modification of antibiotic treatment. The main secondary evaluation criteria (recorded at Day 14) will be fever recurrence, hospital admission, modification of antibiotic treatment, treatment with a beta-lactamine antibiotic efficient against P. aeruginosa, duration of antibiotic treatment, bacteraemia, inefficiency of the study treatment against the identified bacteria, and adverse events of FQ.