All of the following statements about Pneumocystis Jiroveci are true except

Pneumocystis is an oppounistic fungal pulmonary pathogen that is an impoant cause of pneumonia in the immunocompromised host,such as those with HIV infection.PCP may be associated with the development of pneumatocoele & pneumothorax.Other classic findings in chest X ray consist of bilateral diffuse infiltrates beginning in the perihilar regions.A definitive diagnosis of PCP is made by histopathological staining /Immunofluorescence of sputum or BAL. Reference: Davidson edition23rd pg 585