Pneumonia is a common pathology with significant morbidity and mortality. It is recommended in his diagnostic approach to perform either a chest X-ray or a pleuropulmonary ultrasound. Previous studies have shown the advantages of ultrasound in terms of diagnostic performance cost and patient irradiation. However, it remains little used in clinical practice.

The study will be conducted in the Emergency Department of grenoble University Hospital.

Patient admitted to the emergency department for respiratory symptoms (cough, fever, and/or dyspnea) will be enrolled in the study according to the inclusion and non-inclusion criteria and after obtaining his consent.

The investigator will perform the pleuropulmonary ultrasound following the clinical examination carried out by the physician in charge of the patient.

The patient's care is unaffected by the pleuropulmonary ultrasound's outcome, which is unknown to the physician in charge of the patient.

Data collection after the patient's discharge from the emergency department.

Inclusion Criteria:

• Patient over 18 years admitted the the emergency department of Grenoble Alpes University Hospital with respiratory symptoms (cough and/or dyspnea, fever).
• No objection by the subject to the study
• Affiliated to the french social security system (or equivalent)

Exclusion Criteria:

• Patient admitted to a life-threatening emergency
• Patient already on antibiotic therapy on admission
• Patient excluded from another study
• Patient with respiratory signs following chest trauma
• Unable to communicate or non-french speaking patients or those with impaired comprehension or consciousness
• Protected persons referred to in articles L1121-6 and L1121-8 of French public health code (deprived of liberty, tutorship or curatorship)
• The patient already enrolled in the study

Adult patient admitted in the emergency department of Grenoble Alpes University Hospital for suspicion of Pneumonia

The international writing and publication rules (The Uniform Requirements for Manuscripts of the ICMJE, April 2010) will be followed. The minimum anonymized source data for performing the statistical analysis will be made public at the time of publication, with the article, or deposited in an appropriate public database. Other anonymized data may be available from the principal investigator upon reasonable request and with the consent of the sponsor.

In accordance with the French law n ° 2002-303 of March 4th, 2002, the subjects can be informed, at their request, of the overall results of the research. In this study, the investigators commit to individually communicating the overall results to each subject participating in the research by a short (popularized) summary and associated with a copy of the scientific article.

At the time of the publication

The international writing and publication rules (The Uniform Requirements for Manuscripts of the ICMJE, April 2010) will be followed. Moreover, In accordance with the French law n ° 2002-303 of March 4th, 2002