Impact of C-reactive Protein Micromethod Testing in Primary Care on Antibiotics Delivery in Patients With Upper or Lower Respiratory Tract Infections

Inclusion Criteria: * Patients who have received information and given written consent * Patients of any age consulting a general practice with one or more of the following symptoms: fever, cough, arthralgias, myalgias, rhinorrhea; * Symptomatology evolving for more than 24 hours; * Symptoms associated with an upper respiratory tract infection such as otitis, angina, laryngitis, rhinopharyngitis, sinusitis; and/or a lower respiratory tract infection such as acute bronchitis, pneumonia, exacerbation of COPD (chronic obstructive pulmonary disease). Exclusion Criteria: These criteria correspond to factors making interpretation of the CRP value difficult: * Antibiotics taken in the 15 days prior to inclusion * Presence of one of the following signs of severity requiring immediate hospitalization: Impairment of higher functions (altered consciousness) Sign of severity (Pas\<90mmHg; HR\>120/min; FR\>30 cycles/min) Temperature \<35 or \>40°c Inhalation pneumonitis * Sepsis: organ dysfunction, FR\>22cycles/min, PAS≤100 mmHg and Galsgow score ≤ 13(34) * Immediate hospitalization * Pregnancy * Burns * Heat stroke * Presenting with an associated serious pathology: * Associated neoplastic disease in progress * Severe liver failure * Ischemic or thromboembolic pathology * Traumatic pathology * Inflammatory rheumatism * Autoimmune disease