Pneumocystis jirovecii is a fungus that can colonize the airways of some patients and be responsible for a disease called pneumocystosis in other patients and mainly in immunocompromised patients.

Pneumocystosis was mainly linked to HIV in the 1990s, but with the advent of new immunosuppressive molecules used in cancers or autoimmune diseases and with the increase in the number of transplants, the epidemiology has changed in recent years.

Studies on P. jirovecii-related mortality are only based on patients with pneumocystosis. As a result, patients who are simply colonized or patients who are sick but not treated are not taken into account in these studies. The investigators therefore wish to study the overall mortality at six weeks and at three months in all patients with a positive sample for P. jirovecii

Inclusion criteria:

• Adult patients with a positive respiratory sample for P. jirovecii cared for in Strasbourg University Hospitals between 01/01/2016 and 31/12/2018. Positive samples are defined as a direct examination finding cysts or trophozoites after staining with May-Grunewald-Giemsa and/or Gomori-Grocott, a positive P. jirovecii PCR on sputum, tracheal aspirates or bronchial fluid -alveolar
• Subject not objecting to the reuse of their data for scientific research purposes.

Exclusion criteria:

- Subject having expressed its opposition to the reuse of its data for scientific research purposes.

Adult patients with a positive respiratory sample for P. jirovecii