This document contains 35 questions about lower respiratory tract infections covering topics such as: 1. The types of lower respiratory tract infections and the infections that affect the trachea/bronchi and lungs. 2. The pathogenesis, types (e.g. acute, chronic), and causative agents of conditions like bronchitis, tracheitis, bronchitis, pneumonia. 3. The laboratory diagnosis of lower respiratory tract infections including specimen collection and processing, microscopy, culture, and antigen/antibody detection tests.