<prompt> In AIDS patient presenting with fever, cough a diagnosis of pneumocystin pneumonia is best established byCT scan chestBronchoalveolar lavageStaining of intra-nuclear inclusion with silver stainingAspiration and culture  <response>: Ans. is b i.e., Bronchoalveolar lavage Diagnosis of PCP requires Demonstration of the organism in samples obtained from induced sputum. Bronchoalveolar lavage, transbronchial biopsy, or open-lung biopsy. If the histological examination fails :? u PCR is required to make the diagnosis 