[Bronchopulmonary infections].

Infections of the lower respiratory tract usually occurs during winter and are responsible for a high mortality and morbidity rate. The major clinical syndromes that are observed ranges from acute bronchitis to fatal pneumonia. In order to give optimal treatment and to avoid inappropriate use of antibiotics a careful diagnosis is necessary when signs and symptoms of lower respiratory tract infection are presents. Different clinical lower respiratory tract infections are presented with diagnostic and therapeutic approach considering actual belgium epidemiology.