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 Causes of Pneumomediastinum. Pneumomediastinum is the name given to air in the mediastinum. Pneumomediastinum is often caused by injury or disease. It typically results when air leaks from your lungs into your mediastinum. Common causes of pneumomediastinum include: Excessive coughing. Repeated bearing down such as pushing during childbirth.
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).