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| | THE MERCK MANUAL, Sec. 6, Ch. 73, Pneumonia |
 | | Pneumonia (pneumonitis) may affect an entire lobe (lobar pneumonia), a segment of a lobe (segmental or lobular pneumonia), alveoli contiguous to bronchi (bronchopneumonia), or interstitial tissue (interstitial pneumonia). |
 | | In the USA, about 2 million people develop pneumonia each year and 40,000 to 70,000 die; it ranks sixth among all disease categories as a cause of death and is the most common lethal nosocomial (hospital-acquired) infection. |
 | | Mycoplasma pneumoniae, a bacteria-like organism, is particularly common in older children and young adults, typically in the spring. |
| www.merck.com /pubs/mmanual/section6/chapter73/73a.htm (573 words) |
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