Thanks for your question on Health Care Magic. I can understand your concern. Pneumonia is an infection most commonly caused by bacteria. But in some cases pneumonia can be caused by fungal infection, parasitic infection, viral infection and tuberculosis. So we need to rule out all these in your friend s case. And for this she needs to undergo bronchoscopic evaluation with BAL (bronchoalveolar lavage) analysis and biopsy. These will isolate the causative organism and guide us about effective antibiotic treatment. By this we can reduce total duration of treatment and speed up the recovery. Hope I have solved your query. Wishing good health to your friend. Thanks.