[Pneumonia in old age]. / Pneumonie im hohen Lebensalter.

Pneumonia is a common and severe disease in older people. In this group of patients pneumonia is among the four most frequent diseases leading to death. The diagnosis can often be difficult due to an atypical clinical presentation. Therefore, pneumonia should always be considered as the cause of any deterioration in an older person. Geriatric problems, such as frailty, physical and psychological limitations should be recorded as well as the social situation, as all these factors are of prognostic importance. Pneumonia acquired in a nursing home or by people in need of long-term care has a less favorable prognosis. Although this type of pneumonia is considered to be community acquired, special attenion is required. The treatment of pneumonia does not fundamentally differ from the treatment of younger patients but should take special situations into account, such as the patient's wishes documented in a living will when planning therapy. Older people in particular often show atypical clinical pictures with a coronavirus disease 2019 (COVID-19) infection. Therefore, in any acute change in the health condition of an older person COVID-19 should be considered.

[Aging of the lungs and immune system as hellmark in the pathogenesis of idiopathic pulmonary fibrosis and COVID-19]. / Alterung von Lunge und Immunsystem als Meilensteine in der Pathogenese von idiopathischer Lungenfibrose und COVID-19.

Idiopathic pulmonary fibrosis (IPF) does not occur in younger persons. Therefore, it is not surprising that the nine hallmarks of biological aging can all be found in the pathomechanism of IPF. In this respect the homeostasis of cellular protein synthesis, degradation and recycling becomes unbalanced, which causes a dysregulation of repair mechanisms in the case of lung damage. Severve acute respiratory syndrome coronarvius type 2 (SARS-CoV-2) infections may also predominantyl seen in aged persons. In this situation cellular aging of the lungs also plays a role but additionally, the aging of the immune system is also of great importance. Immunosenescence is associated with a loss of naïve T­cells. Moreover, there are gender-specific differences with a loss of B­cells only in men but not in women, which partly explains the more severe course of COVID-19 pneumonia in older men.