Surveillance of Non-invasive Streptococcus Pneumoniae Infections in Belgium

The investigators will conduct a prospective observational study of non-invasive S. pneumoniae infections in Belgium and characterize serotype distributions to evaluate national vaccination programs.

Inclusion Criteria: * Patients living in Belgium at the time of the study, * from whom unduplicated S. pneumoniae isolates were collected in routine practices, * from non-invasive upper (e.g.: pus/fluid from nasal sinus or from otitis media fluid) or lower respiratory tract (e.g. sputum bronchial or endotracheal aspirate, bronchoalveolar fluid (BAL),…) clinical samples, * from patients diagnosed with pneumonia, sinusitis and otitis. Exclusion Criteria: • Patients for whom S. pneumoniae was simultaneously isolated from blood or another usually sterile specimen