深部真菌感染呈持续增多趋势。糖尿病、各种慢性呼吸道疾病、营养不良、肿瘤等基础病致机体免疫功能下降在老年人中常见,故机会性真菌感染率,在各年龄段中,老年人居首位。由于呼吸道与外界相通,可直接吸入空气中的真菌孢子致病,身体其他部位真菌通过血循环及淋巴道播散至肺 Deep fungal infection continued to increase. Diabetes, a variety of chronic respiratory diseases, malnutrition, cancer and other underlying diseases caused by decreased immune function in the elderly common, so opportunistic fungal infection rate, in all age groups, the elderly in the first place. As the respiratory tract communicates with the outside world, the fungus spores in the air can be directly inhaled and pathogenic. The fungi in other parts of the body spread to the lungs through the blood circulation and lymphatic channels