Benefit of SeptiFast Multiplex PCR in the Etiologic Diagnosis and Therapeutic Approach for Onco-hematology Patients Presenting Sepsis

Inclusion Criteria: All patients with onco-hematologic or cancerous pathology, or hematologic disease with chemotherapy and/or radiotherapy and/or some other immunosuppressant treatment in progress presenting an infection requiring hospitalisation and meeting the following criteria: * Sepsis (at least one of the following signs): * Fever \> 38.2°C or hypothermia \< 36°C * FO120 min * PA\<120 mmHg (or 50 mmHg reduction in base numbers) * Respiratory F \> 30/min * Confusion * Hyperleucocytosis (\>12 G/l) or leucopenia (\<4 G/l) * C-Reactive protein \> 40 * With or without organ dysfunction as defined by : * Hypoxia (PaO2/FiO2\<300mmHg) * Oliguria (urine deficiency\<0.5 ml/kg/h in probed patient) * Creatinine \> 200umol/l * INR\>1.5 or TCA\>2 X control in the absence of anticoagulant treatment * Platelets \< 100 G/l * Bilirubin \> 35 umol/l * Lactatemia \> 2 mmol/l * Arterial hypotension (PAS\<90mmHg, or PAM\<70mmHg or reduction of more than 40 mmHG if known hypertension) Exclusion Criteria: * Minor patient * Pregnancy * A patient cannot be included again within 15 days of his/her preceding inclusion