Efficacy of an Empirical Treatment With Amoxicillin-clavulanate (AC) Compared to the Combination Amoxicillin-clavulanate and Ciprofloxacin (AC+C) in the Outpatient Care of Chemotherapy-induced Fever in Adult Haematology Patients.

Inclusion Criteria: 1. Adult patients (≥ 18 years) with one of the following haematological disorders (in whom chemotherapy regimens are expected to provoke neutropenia lasting \<7 days) (1) lymphoma of all histological types treated with the goal of remission; (2) myelodysplasia treated with azacytidine; (3) acute myeloblastic leukaemia, treated with a non-intensive scheme (azacytidine, azacytidine+venetoclax, other oral treatment against molecular targets) 2. Written informed consent 3. Patient able to understand all information related to the study and able to follow the protocol procedures (phone call and completion of the patient follow-up form (electronic or paper)) 4. Affiliated to or beneficiary of the welfare care Exclusion Criteria: * 1\. Patient under legal protection 2. Patient deprived of liberty by judicial or administrative decision 3. Patient who is the investigator, any member of the study team, or a relative directly involved in the trial, including assistant physicians, pharmacists, study coordinators, etc… 4. Participation in another interventional clinical trial 5. Impossible collection of informed consent (including non-francophone patient, or cognitive disorders) 6. Body mass index (BMI) \> 30 7. Basal neutrophils count \< 1000/mm3 (on the latest available blood test performed \< 1 month before inclusion) 8. Aminotransferase serum levels \> 5 X normal values (on the latest available blood test performed \< 1 month before inclusion) 9. Creatinine clearance \< 30 mL/min (on the latest available blood test performed \< 1 month before inclusion) 10. Previous treatment with CAR-T cells 11. Previous allogeneic or autogeneic bone-marrow transplantation 12. Chronic obstructive pulmonary disease (COPD) 13. Previous invasive fungal infection 14. Allergy to one of the study medications 15. Contraindication to fluoroquinolones: 1. hypersensitivity to ciprofloxacin, to other quinolones, or to any of the following excipients (microcrystalline cellulose, crospovidone, anhydrous colloidal silica, magnesium stearate, hypromellose, macrogol, titanium dioxide), 2. treatment with tizanidine, 3. previous hypersensitivity to any quinolone, 4. previous tendonitis attributed to any fluoroquinolone, 5. epilepsy 16. Contraindication to amoxicillin-clavulanate 17. QT prolongation (defined as a QT interval \> 0.45 seconds for males and \> 0.47 seconds for females) 18. Antibiotic prophylaxis (with the exception of the combination sulfamethoxazole and trimethoprim) 19. Pregnant or breastfeeding women, 20. Women not using contraception 21. Patient treated with anti-psychotic drug