Bronchitis is an inflammation of the bronchial tubes, the airways that carry air to your lungs. It causes a cough that often brings up mucus. It can also cause shortness of breath, wheezing, a low fever, and chest tightness. There are two main types of bronchitis: acute and chronic.Encyclopedia Entry for Bronchitis :Bronchitis - Respiratory syncytial virus (Paramyxovirus), Parainfluenza virus (Paramyxovirus), Influenza virusEncyclopedia Entry for Bronchitis :Bronchitis. Can be caused by Mycoplasma pneumoniae, Chlamydia pneumoniae and Bordetella pertussis.Information from Marcello Allegretti.