1 At age 65, one out of three people has a hearing loss. 2  60 percent of the people with hearing loss are either in the work force or in educational settings.
The 3 main causes of pneumomediastinum are. 1  Alveolar rupture with dissection of air into the mediastinum. 2  Esophageal perforation. 3  Esophageal or bowel rupture with dissection of air from the neck or the abdomen into the mediastinum.
Streptococcus pneumoniae, a type of bacteria, is the most common cause of pneumonia. Legionella pneumophila is the bacterial type that causes the pneumonia known as Legionnaires' disease. Other bacteria types that can cause pneumonia include the bacteria that cause so-called atypical pneumonia, Legionella pneumophila, Mycoplasma pneumoniae, and Chlamydophila pneumonia. The most common cause of viral pneumonia in adults is the influenza virus. A number of different respiratory viruses cause pneumonia in children, such as respiratory syncytial virus (RSV).