一个多世纪以来,老年人中的肺炎已成为常见的致死性疾病。有许多原因使老年人特别容易感染肺炎,其中包括与年龄相关的生理学、解剖学和免疫学等方面的变化。脑和(或)食道的病症可能偏向于导致吸入性肺炎,这在老年人中特别常见。吸烟对肺的损伤则偏向于引起肺部感染而导致肺气肿或慢性支气管炎。肺炎主要的发烧症状,在许多老年人中并不明显。随着人的变老,免疫能力也相应下降。与年轻人比较,这些因素,使老年人更容易感染肺炎,或者使肺炎趋于严重而威胁老 Pneumonia in the elderly has become a common fatal disease for more than a century. Pneumonia is particularly vulnerable to the elderly for many reasons, including age-related changes in physiology, anatomy and immunology. Conditions of the brain and / or esophagus may be biased towards causing aspiration pneumonia, which is especially common in the elderly. Smoking on the lung damage is biased toward causing pulmonary infection leading to emphysema or chronic bronchitis. The main symptoms of pneumonia are not obvious in many older adults. As people get older, their immune abilities also decrease. Compared with young people, these factors make the elderly more susceptible to pneumonia, or make the pneumonia tend to be serious and threaten the old