<unk>  is caused by Pneumocystis jirovecii, a fungus which is generally found in the lungs of healthy people, without causing disease until the person's immune system becomes weakened. Risk factors<unk>  occurs predominantly in people with HIV/AIDS. Other risk factors include chronic lung disease, cancer, autoimmune diseases, organ transplant, or taking corticosteroids.
Pneumocystosis
Alveolar hydatid disease
Emmonsiosis
Rhinitis medicamentosa
Lung abscess
Bronchorrhea
Bronchitis kettle
Vaginitis emphysematosa