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.
Dozens of different types of bacteria can cause pneumonia: 1  Streptococcus (pneumococcus) is the most common cause of bacterial pneumonia in adults and there is a vaccine available for it. 2  Atypical pneumonia is caused by bacteria such as Legionella pneumophila, Mycoplasma pneumoniae, and Chlamydophila pneumoniae.