Key to Improve DiagNosis in Aspiration Pneumonia

Inclusion Criteria: * Patient intubated ≤ 24 hours for unconsciousness (stroke, meningitis, drug intoxication, metabolic disorders, epilepticus, cardiac arrest). * Inhalation table with hypoxemic acute respiratory insufficiency post-consciousness + chest x-ray revealing one or more compatible infiltrates + t °\> 38 ° C). * Age ≥18 years * Patient affiliated to the social security system. * No opposition obtained Exclusion Criteria: * Immunocompromised patient. * Cardiorespiratory arrest requiring therapeutic hypothermia. * Pneumopathy nosocomiale (pneumopathy beginning\> 48h after hospital admission). * Infectious Pneumonia in the previous 30 days. * Previous hospitalization in the previous 30 days. * Patient under antibiotic at baseline. * Bacteremia. * Mechanical ventilation begun before unconsciousness. * Report Pa02 / FI02 \<80. * Patient under curatorship and / or guardianship.