lower respiratory tract infection
英[ˈləuə ˈrespərəˌtɔ:ri: trækt inˈfekʃən]美[ˈlaʊɚ ˈrɛspərəˌtɔri trækt ɪnˈfɛkʃən]
Lower respiratory tract infection, while often used as a synonym for pneumonia, can also be applied to other types of infection including lung abscess and acute bronchitis. Symptoms include shortness of breath, weakness, high fever, coughing and fatigue.