Infectious Diseases Experts as Part of the Antibiotic Stewardship Team in Primary Care

Inclusion criteria at centre-level (clusters) * Primary care centres belonging to the Delta del Llobregat healthcare area. * Prior experience in clinical research and formal agreement to participate in the study. * Comparability of their reference populations. All general practitioners of the 6 primary care centers will be included in our clinical trial, excepting paediatricians. Data collection will be performed on patients attended in these centres. Inclusion and exclusion criteria will be applied on the patients attended by general practitioners: Inclusion criteria at patient-level criteria (unit for secondary objectives) * Adult patients (aged \>14 years). * Diagnosed with an acute URTI (including pharyngoamygdalitis, sinusitis, otitis) or UTI (including cystitis, prostatitis, pyelonephritis) during the study period. * Patients attended by a GP at the selected centres. Eligible patients will be identified following the International Classification of Diseases (ICD-10) CM codes as follows: * URTI: J00, J01, J02, J03, J04, J05, J06, J31, J39, H60, H62, H65, H66, H67, H83 and H92. * UTI: N10, N30, N39, N41, R82 and O23. Exclusion criteria: * Patients less than 14 years old. * Patients with indwelling urinary catheter. * Patients with congenital urinary tract abnormalities. * Pregnant women. * Patients undergoing urological surgery.