Viral bronchitis usually
causes a mild fever. Little to no mucus is coughed up from the lungs in the
beginning, and you most likely do not feel very sick. If you have viral bronchitis
along with influenza (flu), you may feel quite
Bacterial bronchitis may cause a higher
fever and a cough that often produces thick, dark, discolored
mucus from the lungs (not mucus drainage from the back of the throat). You may
feel very sick.
"Fibrosis" is a term used to refer to scarring, so pulmonary fibrosis means scarring in the lungs. Pulmonary fibrosis can be caused by many conditions, including chronic inflammatory processes (like sarcoidosis or Wegener's granulomatosis), infections, environmental agents (asbestos, silica, exposure to certain gases), exposure to ionizing radiation (such as radiation therapy to treat tumors of the chest), chronic conditions (lupus, rheumatoid arthritis), and certain drugs, such as nitrofurantoin...