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HIV has become a major health problem in India, patients commonly succumb to opportunistic infections (OIs), respiratory infections being an important cause of morbidity and their accurate diagnosis is still a challenge. Our aim was to study the occurrence of Pneumocystis pneumonia (PCP) in HIV/AIDS patients with respiratory complaints attending ART clinic and to compare various diagnostic methodologies. One hundred and twenty five HIV/AIDS patients presenting with respiratory symptoms like cough, fever, breathlessness etc, were enrolled, and induced sputum samples were collected. Samples were homogenized using glass beads and Dithiothretol. Smears were prepared and examined by Immunoflourescent staining (IFAT), Gomori methanamine silver staining (GMSS), Toludine blue O staining (TBO) and Giemsa staining for Pneumocystis jiroveci. Among the 125 patients who presented with respiratory complaints, 34 cases (27.2%) were diagnosed as having PCP. All 34 cases were detected by IFAT followed by GMSS, Giemsa and Toludine blue O staining in decreasing order. The mean CD4 count was 67.27cells/μl. PCP has become an important health problem in HIV/AIDS patients with low CD4 counts in India. IFAT remains the most sensitive method for the detection of this uncultivable organism. In resource poor settings where an immunoflourecent microscope is not available, diagnosis of PCP still remains problematic.

Pneumocystis pneumonia in HIV patients: a diagnostic challenge till date